In the year 2022, Ayanami Shiratsuyu (the main protagonist), a professional child idol, grew an interest in the game of Sword Art Online, having participated in the game's Closed Beta and using her connections to score herself a copy of the game and logging in for the beginning of the official service. However, the game was a death sentence. No one was allowed to leave. The only way to leave was to win: clear all 100 floors of Aincrad.
It was only in mid-July, 2025 was Sword Art Online finally cleared. The remaining 5,938 players were logged out from the game and the incident hit the global news yet again. With the incident fresh in the minds of Japanese citizens, the industry of VRMMORPGs was halted with [[w:c:swordartonline:ALfheim Online]] and other respective VRMMOs that were released during the SAO incident being all shut down by the government. However, this halting of the industry did not last long. Under the direction of the Rath company, the new game of Spell Blade Online was created using the old data from ALfheim Online. The Closed Beta was released to 3,000 players in November 2025 as a homage to the memory of the day Sword Art Online began.
With the successful completion of the Closed Beta with no issues, the project was given the 'okay' to continue with an official release. Preceding this, however, Yƫna Shigemura's father, Tetsuhiro Shigemura, laid out the newly invented [[w:c:swordartonline:Augma]] which utilizes Augmented Reality as its main interface. While waiting for the official release of Spell Blade Online, the ARMMORPG, Ordinal Scale, holds its Closed Beta.
A female Integrity Knight who is close friends with Alice.
- Accidental Pervert: A Skit during "Overflowing Eternal Affection" Scout has Eydis mixing up the times for men and women at the Great Bath, with her going in for her bath shortly before Bercouli does, forcing her to hide until he leaves.
- The Ace: Eydis is probably one of the most powerful Integrity Knights in the order, not only possessing excellent swordsmanship skills and a deadly Divine Object to compliment them, but she's probably among their best Sacred Art users with her knowledge of arts that allow her to Self-Duplicate and Life Drain, giving her a good deal of versatility in battle. When we first meet her, she's also shown to be quite intelligent and is capable of pulling off Sherlock Scans to deduce events.
- She shows herself to be this on her first mission as a Knight; not only does she sense the incoming enemies and displays no nervousness, but she comes out of it with nary a scratch, impressing Duesolbert. She however tries to downplay this by noting how there weren't many and she had his help. In response, she was given Kirimai after they returned from the mission, making her the first the Integrity Knight at the time to get her dragon so soon, and Quinella was immediately considering granting her a Divine Object.
- Action Girl: As per the requirement to be a female Integrity Knight.
- Advertised Extra: Downplayed. When it was announced, Eydis was one of the first bombshells dropped about Rising Steel, being an Integrity Knight made specifically for the game, and she was featured heavily in advertisements for it. When it came out however, Eydis didn't have much importance in the main story, which while adding new scenes that weren't there originally was effectively a retelling of the Alicization story arc, with Eydis herself only really having appearing in two of the chapters. That being said, she is still playable and she makes more appearances in Events, a series of which illustrates her actions during the War of Underworld.
- Ambadassador: After the War, Kirito requests that she act as something of an Ambassador in the Dark Territory to help in preventing another war, a position she's quick to agree to.
- Ambiguously Bi:
- There are strong teases that her Pseudo-Romantic Friendship with Alice is a genuine crush. While her orientation is never explicitly stated, her interest always peaks whenever she finds out a new Integrity Knight is a girl (especially Alice), while similarly disappointed whenever it's a boy. She often tries to pull Alice into taking a bath with her, praises Alice in virtually every sentence about her, acts extremely jealous when someone else gives attention to Alice, and she seems to treat Alice like a Living Emotional Crutch where seeing her hurt is enough to send her into a Roaring Rampage of Revenge. The ambiguous part comes from Eydis's thinking of herself as a Cool Big Sis to Alice and the fact her attachment stems from Alice reminding her of a little sister from her past life.
- The "Overflowing Eternal Affection" event makes it even more interesting. It appears while Eydis is capable of giving Alice sisterly love, Alice also detects "impure thoughts" from her at times.
- Her encounter with Lipia also seems to suggest this, with her making frequent remarks about how she and her name are cute and even gives her the nickname "Lippy". She's also quick to kill a bunch of Dark Knights who mock her after her death.
- Her interest in girls becomes more blatant in "Ghosts of War". While her and Kirito's claims that she loved Alice could feasibly be seen as sisterly affection, she's also quick to become an Ambadassador in the Dark Territory at Kirito's request, since it'll give her a chance to meet and help all the cute girls over there.
- Starts leaning into Bi territory in "Eydis and the Orphanage Part 1.5", where she eagerly agrees with Shirley when she says she'd prefer a faithful man like Lord Shasta. Though this may have been to tease Kirito.
- [Dressed to Whom?] Eydis, a purchasable homescreen character version of Eydis in a wedding gown, has some implications that the one she's dressed up for is Alice.
- In the "Holding Hands With You" Event, a cross event with Memory Defragnote though weirdly enough, Eydis is representing Memory Defrag in this case, she helps Alice with her attempts to disrupt Kirito and Asuna's (event based) wedding, knowing it would likely fail but using as a chance to see Alice in a dress, and dress up herself, and maybe be Alice's rebound girl, and in the climax when she and Alice interrupts Kirito and Asuna's kiss, she proclaims that "all of the cute girls in the world belong to me!!!". That being said, she's quick to glomp Kirito while Asuna and Alice are arguing, claiming to want to get in on the fun, though whether this is because she doesn't mind the idea of marrying Kirito or just her Trolling the other three is never stated outright. The fact that this is Implied to be a Shared Dream between her and Kirito certainly doesn't help matters.
- In "Moon Cradle: Epilogue", she's glad that Ronye and Tiese are now Integrity Knights, feeling that having more cute girls in the council meetings will make things less dreary.
- When she first meets Sylvie when picking her up for the exchange program, she's quick to gush over her and suggests that they hang out when they get to the Human Empire as if asking her out on a date.
- Apologetic Attacker: Despite not remembering anything from while she was in her Superpowered Evil Side in "Memories of the Abyss - Part 2", she feels compelled to apologise to Bercouli for attacking him.
- Awesomeness by Analysis: Eydis proves to be very intuitive, finding out and being able to summarize what happened when Kirito and Eugeo fought Ugachi just from the general state of the cave and seeing some weapons strewn about the floor. She also uses this previous deduction to figure out that Alice brought Kirito to Rulid Village after Quinella's defeat and is able to find her before she can even finish making a hut for them to live in.
- Badass Adorable: A friendly and cheerful girl, and not only is she a Master Swordswoman and Magic Knight like the other Integrity Knights, but she's possibly the closest thing they have to an assassin.
- Badass Armfold: As shown in her profile picture.
- Badass Boast: "Don't Underestimate the Integrity Knights."note her quote when summoned and after using her Incarnate Skill
- Bathing Beauty: Eydis really likes her baths, constantly asking Alice if she wants to have a bath and even citing the Great Bath as her favorite room in the Cathedral.
- The first time we see her bathing is in a flashback with her little sister Mary, which was where her love of baths came from.
- During the "Overflowing Eternal Affection" Scout, there's a series of Skits depicting how Eydis spends her baths, either by herself or with other characters.
- In one of said Skits, she contemplates opening one of the windows in The Great Baths to make it into some kind of open-air bath to make it better, but opts out of it in case she gets into trouble, since basically every window in the Cathedral is closed.
- "Memories of the Abyss Part 1" reveals that the first thing she did after her synthesis and tour of the Cathedral was have a dip in the Great Baths.
- Her love of baths persists even when she's in her depressed Superpowered Evil Side.
[Memories of the Abyss] Eydis: Baths... My refuge of bliss! Though they're even more blissful when I get to share them with someone...- Bearer of Bad News: "Eydis and the Orphanage" is about her delivering the news of Lipia's death to her orphanage.
- The Berserker: Her Superpowered Evil Side in "Memories of the Abyss - Part 2" is a relentless and violent fighter, slaughtering anyone who she thinks is in the way of her getting to Mary, even attacking Bercouli. This also applies in gameplay, where her Enhance Mode causes her attacks to drain 30% of her health, but also allows her to apply a more powerful form of Continuous Damage and regain her health whenever her enemies are damaged by it. That being said, she's eerily calm as the Homescreen Character...
- Better to Die than Be Killed: Upon Kirito using his arm to block against her sword's phasing properties and knocking it away, she asks Kirito to kill her rather than live with the shame. Kirito of course refuses.
- Beware the Nice Ones: Friendly she may be, but Eydis is still one of the top Integrity Knights and is not someone you want to piss off. Case in point, she could have easily incarcerated Kirito if there wasn't the risk of hitting Alice and she slaughters a whole battalion of Dark Knights by herself after they insult Shasta and Lipia's deaths.
- Big Sister Mentor: Was eager to be this to Alice. On Alice's first mission, she was paired up with Eydis in taking out Goblins sighted at a marsh in the east, and a Social Mode event reveals that she helped Alice in communicating with Amayori when she becomes fussy over being bathed due to an itch.
- Breakout Character: Since the release of Unleash B;ading, Eydis has proven to be an extremely popular character, to the point that not only did she get a special scout where players could try and get both of her currently available units, but that was shortly followed by an event explaining her actions during the War of Underworld.
- She's become so popular that she was included in a contest between her, characters from SAO's main Gameverse and Koharu from Integral Factor, and came out as one of the three winners along with Rain and Itsuki.
- Later she even gets featured in a Costume Design Contest alongside the main trio (Kirito, Eugeo, and Alice).
- Her popularity has gotten to the point where, along with characters from the other games, she was added to Alicization Lycoris as a playable DLC character with her own moves. She would later be announced for its' sequel, Last Recollection.
- Eydis would also become a playable character in Memory Defrag, becoming the first mobile game character to cross over into other mobile games.
- Even after Unleash Blading was shut down, Eydis' birthday on September 4th is still celebrated by both the community and the series' creators, the latter of which still release official art of her for the occasion.
- Brutal Honesty: Unlike other Knights, who at least try to pretend they respect him, Eydis makes it no secret that she loathes Chudelkin, with just looking at him being enough to give her a Brain Bleach reaction and noting that atmosphere is so much better when he's not around.
- Bunny-Ears Lawyer: She is certainly eccentric when compared to the other Knights, being excitable and friendly along with her affectionate nature towards Alice, but Bercouli commends her for being an excellent Knight and she certainly proves it. Iskahn even feels compelled to ask if she's really a Knight when they meet at the Peace Talks due to how casually she's treating going to the Dark Territory.
- Canon Immigrant: While starting off as a game original character, Eydis' popularity eventually led Reki Kawahara to officially add her canon.
- Cast from Hit Points: As [Memories of the Abyss] Eydis, all of her moves while in Enhance Mode will drain up to 30% of her HP, but allows her to inflict Total Continuous Damage, a more powerful version of Continuous Damage that heals her after her opponents turn, and increases the power of some of her moves when the Recollection Field is 3 or higher.
- Casting a Shadow: The Darkness Rending Blade is said to utilize both Light and Dark elements. She also makes use of Umbral Sacred Arts, such as creating shadow clones of herself and being able to drain life from her enemies.
- Chekhov's Gunman: Her trip to the dragon's homeland to get the material for her Divine Object proves useful in "Hometown Waterside", where Amayori gets injured and her healing is hindered by the grief of her mother's recent passing, to which Eydis suggests taking her there may help lift her spirits and help in her recovery.
- Clingy Jealous Girl: She gets very jealous when someone else becomes close to Alice and will fight them for their attention, much like she does with Eldrie.
- Clothing Damage: Downplayed. During her fight with a revived Sigurosig, the latter manages to grab Eydis and attempts to bearhug her to death, causing her armour to crack and bend before Shirley pulls a Big Damn Heroes.
- Color Motif: She's themed after black, much like Kirito.
- Combat Medic: Takes it a step further, having a spell that hurts her enemies and heals her allies.
- Cool Big Sis: Sees herself as one to Alice, acting very doting and affectionate towards her, as well as being protective to the point that she'll attack anyone who hurts her, as well as let anyone who saves her off even if they're an enemy of the Church. Alice herself alternates between being touched or annoyed depending on how far she takes it. It's heavily Implied that this is because she was one before her Synthesis, and Alice reminds her of her real little sister for some reason.
- Apparently, she also tries to be this for some of the Knights who are Synthesised after her only to be brushed off, as shown by her first meeting with Scheta. Even then though, it's implied that she willing to stick up for them regardless, as shown when another Knight acts like a condescending Jerkass to Scheta. This sentiment is shown to have lasted in the "Peace Treaty" Event, where she's outraged that the Giants would dare get in the way of Scheta and Iskahn's wedding by rebelling and taking active part in putting an end to it, as well as making Iskahn promise to make Scheta happy.
- You could also argue she's this to Linel and Fizel. While her interaction with them in "Eydis' War of Underworld: Shadows of War" might look like that she considers them Annoying Younger Siblings more than anything, she does relent to them wanting to talk to her with little resistance and her insistence on them not going to the frontlines where Kirito is, which contrasts the other Knights' asking them to join the war in the first place, can be seen as her not wanting them to get hurt. There's also the possibility that her not noticing an assassin while talking to them when she was able to sense one earlier implies that she trusts them enough to let her guard down around them. She also admits that they have their cute moments when she thinks they're being envious of her figure while in the bath.
- During her first mission with Alice, and in turn Alice's first time riding a dragon and fighting Dark Territory forces, she has them start their trip slow due to how most Knights are uncomfortable riding dragons for the first time, only for Alice to assure her that she's having no trouble.
- After their first mission together, she praises Alice's combat ability while they're in the bath, even claiming that she may one day surpass her, something Alice is very humbled by. She then proceeds to hug her and admit that she sees Alice as a little sister, something Alice is unbothered and even touched by.
- Think Hard and Your Wish Will Come True goes into detail about how she was this before becoming a Knight. Her younger sister Mary always had an injured leg and Eydis, using her Calling of Swordswoman as an excuse to travel, spent her time searching for a way to heal it, even if it meant putting her life at risk. The Ghosts of War event also reveals that she often told Mary stories of her adventures, her favourite being ones of "mysterious spider" that Eydis often sees.
- She's quick to be this for the orphans at Lipia's orphanage after her death, comforting them as best she could when telling them the bad news.
- In "Hometown Waterside", she helps Alice when Amayori gets injured by advising her and guiding her to the dragon's homelands to help in her healing process and coping over her mother's death.
- Cooldown Hug: Gives one to Shirley after she insists on staying strong and not crying after Lipia's death.
- Covert Pervert: In line with her Ambiguously Bi status and Implied crush on Alice, she has some moments of this.
- According to Alice one time when they're bathing together, Alice often senses "impure thoughts" from her when they interact.
- According to Alice as the homescreen character, she often tries pressuring her into joining her for a bath.
- In "Hometown Waterfront", she's quick to talk Alice into dressing up in a swimsuit with her. That being said, that's really the worst she does, and she spends the rest of the time just having fun with Alice.
- Cute Clumsy Girl: While she's a skilled and experienced Integrity Knight, she does have moments on this.
- For one, there's the aforementioned Accidental Pervert moment.
- Her Incarnate Attack as [Skies Illuminating in the Waters] Eydis has her form a volleyball from Wind Sacred Arts to launch at the enemy, only for her to screw up the spike and for it to harmlessly bounce towards them. Then when she looks closer to see what went wrong, it suddenly explodes in a giant tornado, causing her to suffer an Oh, Crap! and run away while she Screams Like a Little Girl.
- Dark Is Not Evil: Along with her generally dark color scheme, Eydis makes use a Divine Object powered by darkness to phase through enemy weapons and armor and create a Fog of Doom, and a lot of the Sacred Arts she uses seem more like something a Dark Mage from the Dark Territory would use. Despite this, she's a Nice Girl and (self-proclaimed) Cool Big Sis to Alice, and is quite possibly the least malicious Integrity Knight Kirito encounters.
- Deadpan Snarker: Despite her generally upbeat demeanour, she has moments of this.
- She often treats Iskahn praising Scheta's strength like a lovesick fool gushing about his girlfriend, often telling him to get a room.
- When she was first summoned, she quickly grew annoyed with Chudelkin, and when told by Bercouli that he was the Prime Senator, second only to Quinella herself, she responds with a sarcastic "Ohhh. Fancy."
- Declaration of Protection: After she and Shirley are attacked by assassins, leading to Eydis breaking the Seal of the Right Eye, and ruing how her and Kirito's lack of caution put Shirley in danger, she swears to Shirley that she'll never put her in danger in again, vowing to never leave her side.
- The Defroster: Eydis has an understated talent for this, getting the otherwise Stoic Alice to act more carefree and cheerful around her, quickly becoming a Cool Big Sis to Shirley despite her wariness against her as Lipia's rival, and even managing to get Sylvie, who's trauma at witnessing her parents' deaths during the War instilled in her a resentment so deep that she desired to re-instigate war with the Human Empire, to lower her guard a a little without her realizing due to her upbeat nature.
- Designated Girl Fight: In a flashback event where Eydis and Bercouli enter the Dark Territory and encounter Shasta and Lipia, the men and the ladies are all paired against each other in battle.
- Dishing Out Dirt: Downplayed. Her Divine Object, the Dark Slash Sword, was created from a stone found at the bottom of a deep lake where it never saw Solus' light. When obtaining it, Eydis described the stone as heavy and cold to touch, even claiming the air around it grew darker and colder. That being said, it's abilities have nothing to do with it's origin as a stone, being all Casting a Shadow with hints of Making a Splash.
- Don't Call Me "Sir": Given how carefree and casual she is, she requests others not to address her with formality.
- Dragon Rider: Like all Integrity Knights, she has her own personal dragon mount. Hers is a white dragon with black wings, similar to her own color scheme, that she has dubbed Kirimai.
- Due to the Dead: After the war, she wants to make sure the people who died, including Vixur and Lipia, get proper burials.
- Dull Eyes of Unhappiness:
- Her shadow clones sport these, representative of the fact that they aren't the real Eydis.
- As [Memories of the Abyss] Eydis, she's uncharacteristically gloomy and depressed over her lack of memories and has hints of being a Death Seeker, which is reflected in the duller colour of her eyes.
- Eye Scream: Like Alice and Eugeo before her, she breaks the Seal of the Right defying pre-established orders and directives, losing her right eye in the process. In her case, she went against Quinella's orders to only use her Memory Release technique when no allies (i.e. Shirley) are present, allowing her to blind the assassins trying to kill them and slaughter them all.
- Fanservice Pack: Downplayed. [Daybreak Guardian Knight] Eydis introduces her in an updated outfit that she's slated to wear in Unleash Blading's next arc. In contrast to her more modest Integrity Knight armour, this updated uniform has Eydis don lighter armor, including a less conservative chestplate that makes her Hidden Buxom not so hidden, and hidden by her cape is a new Sexy Backless Outfit.
- Fog of Doom: Using Perfect Weapon Control, her Darkness Rending Blade can use its memories of being stuck at the bottom of the ocean to create a giant black fog to blind opponents so Eydis can get the drop on them.
- Foil:
- To Alice. Both girls were originally commoners who were Cool Big Sis' that were arrested and synthesized into Integrity Knights for breaking the Taboo Index, and part of what makes them considered so powerful even among their peers are their skills as Magic Knights, the both of them having experience in one field of it while the other, due to their original Callings, seems to be case of Inexplicably Awesome. However, while Alice is the calm and even cold Blue Oni who was originally a Child Prodigy with Sacred Arts before being arrested for accidentally placing a few fingers in the Dark Territory, Eydis is the excitable and friendly Red Oni who was originally a grown Master Swordswoman and was arrested for being fully aware of her willingness to defy the Taboo Index if it meant helping her sister.
- To Kirito. Both are Dark Is Not Evil Master Swordsmen who are Cool Big Siblings with playful personalities, have a close relationship with one of the blond Deuteragonists of Alicization, and wield Divine Objects made from non-metal materials, Kirito a branch and Eydis a stone. However, both respond differently to losing a loved one in some way, with Kirito entering a Heroic BSoD that leaves him in an Angst Coma when Eugeo dies, while Eydis calmly accepts that, with Alice having to leave the Underworld and go to the real world, she may never Alice again but is content so long as she's happy.
- Friendly Enemy: She takes a quick liking to Lipia when they first meet, giving her the nickname "Lippy" and even looks forward to meeting her again despite her words to the contrary. She's also quick to slaughter an entire battalion of Dark Knights when they speak ill of her and mock her death.
- Friend to All Children: Upon seeing Berche in the 2nd anniversary event, she greets him enthusiastically and mentions how much she loves babies.
- The Gadfly:
- When introducing her to Kirito, she tells Shirley that he's a lady killer and teases him for his Chick Magnet status, much to his embarrassment. This backfires when he then tells Shirley that she can ask for Eydis' help with anything, which she didn't agree to, and Shirley eagerly agrees. She later takes advantage of Kirito visiting the orphangage with Asuna and Ronye in tow in "Seal of the Right Eye" to mess with him further, and nearly get him in trouble with Asuna and Ronye.
- Gameplay and Story Segregation: It's noted that her Darkness Rending Sword is similar to Eugene's Demonic Sword Gram in that it can bypass enemy defenses with its ability to go through other people's weapons and armor. Unlike Eugene however, who has a skill that applies a 20% Physical Res. Debuff to its target, she has no such skills that would imply this and as an equipable weapon, the Darkness Rending Blade doesn't give any buffs that would imply such an ability, aside from a critical damage buff against Light-elemental enemies. It isn't until she appears as [The Sword Shining in the Darkness] Eydis, a Luminous Elemental Charge Unit, that this is rectified, with her Charge attack applying a 20% Physical Res. Debuff and her Incarnate Skill doing the same to both Physical and Magical Resistance, and more so later as [Under the Osmanthus] Eydis, a Wind-Element Break with an Enhance Mode that both buffs her attack and causes all her special attacks to inflict a Physical Debuff and deal bonus damage against enemies affected by defense debuffs.
- Genki Girl: She's very upbeat and cheerful for an Integrity Knight.
"Why the long face? Come on, think positively!"
- Guile Heroine:
- When tasked with retrieving the item that would become her Divine Object, she hit a roadblock when the lake she was supposed to dive into to get it was deep for her to reach the bottom before she ran out of oxygen. She was able to get around this by riding down there on Kirimai, who like most dragons are fond of fish and are practiced swimmers as result, allowing her to ride to the bottom, grab the stone there, and head straight back up before her breath ran out.
- Handicapped Badass: While defending Shirley from some cloaked figures, their leader hits her with a dart containing a poison similar to the one Fu Za used on Vixur[note] just replace "Dragon" with "Giant"[/note]. Despite this, she's still able to hold them off and even slay a few, forcing them to focus on her in an attempt to overwhelm her.
- He Is Not My Boyfriend: Downplayed. She takes umbrage with Lengyl's use of the word "intimate" to describe her and Iskahn's growing friendship, claiming a "certain someone" would cut her head off if that was the case.
- Hero of Another Story: The main reason she appears to be absent from canon is that her role in the story always occurs either offscreen or away from the main action. Rising Steel ends up filling in these unseen Eydis scenes.
- When Kirito and Eugeo are storming the Cathedral, she shows up on the Floor 95 lookout after Kirito carried the unconscious Alice on his back. Whereas the anime had a Time Skip straight to Alice waking up.
- Eydis very nearly goes to collect Kirito and Eugeo after they broke the Taboo Index, but Chudelkin insists Alice be the one to go instead.
- In War of the Underworld, Eydis isn't seen on the frontline because she is in charge of a reserve force that is at the far back. When she does visit the decoy army camp to get answers on the sudden earthquakes, actually Asuna logging in as Stacia, she leaves soon after having a meal instead of visiting Alice because Bercouli mentioned she, Asuna, Sortiliena and Ronye are talking in Kirito's tent and she didn't want to interrupt, instead heading to the Great Gate to back up Fanatio and Deusolbert.
- Hidden Buxom: It turns out that Eydis is very well-endowed under that armor.
- Hold the Line: While she and Kirito are making their way to Tolgash's camp to take him out and save Sylvie, they both sense a squad of dragon riding Dark Knights approaching them. In response, Eydis tells Kirito to go ahead while she deals with them.
- I Choose to Stay: Downplayed. While she has to return to the Human Empire at some point, she chooses to stay at Lipia's orphanage for a bit as a guard after the fiasco with the monsters and the Hooded Man.
- Intangibility: Like Eugene before her, it's her weapon that can phase through objects. That said, Kirito exploits