The new main character for the Distant Finale, he is the son of a legendary samurai known as Kuki. He was trained alongside his brother Tohma and his father's student Jushiro, but due to his natural talent and dedication, he was known to be almost peerless with a sword. One day his father was found dead, his sword, Blade of the Flaming Sun, seemingly stolen. Suspecting his brother Tohma, Seishiro takes up his father's Full Moon Blade and joins Jin-Emon Hanafusa's journey to Riten Kyo, where Tohma, along with the Razor Trio, are known to be attacking the government and terrorizing the inhabitants.
- Aloof Ally
- Aloof Big Brother: With Tohma.
- Anime Hair: A Samurai Shodown main-character tradition.
- Arrogant Kung-Fu Guy
- Blue Is Heroic: The predominant color on Seishiro, not to mention his father's Ancestral Weapon that has a light-blue colored blade. His sandals also have blue cords.
- Cain and Abel: The Abel to Tohma's Cain.
- The Cameo: Only appears as a SNK Character Card in SNK vs. Capcom: Card Fighters 2.
- The Captain: Of the Oniwabanshu, a position inherited from his father.
- Catchphrase: "Hmph."
- Counter-Attack: His fighting style is focused on telegraphed but precise slashes.
- Cruel Mercy: Spares Tohma in both of their endings. Knowing Tohma, this may be a Fate Worse than Death.
- The Denouement: Kunou Seishiro's story-mode is a continuation of Kuki's that climaxes in a fight with Haohmaru.
- Dual Wielding: As Kunou Seishiro, he carries his sword and Tohma's.
- Expy: Blue-themed heir of a clan with cold / moon / water motifs in search of his adoptive younger brother to kill him... are we talking about Seishiro or Sogetsu?
- Final Boss: For Tohma.
- Fire/Water Juxtaposition: The water to his brother's fire.
- Good Is Not Nice: He is extremely rude to almost every character in the game.
- Heavy Sleeper: Has the habit of falling asleep anywhere and at anytime he feels like it. Including other characters' monologues.
- Knight Templar
- Meaningful Name: His family name means "nine hollyhocks", and his name is pronounced as "stem" , but it's written as "blue ambitious wolf". As Kunou, he changes his family name to "nine emperors".
- Meaningful Rename: Kunō Tenshō-ryū (Nine Rulers Ascension Art) is the complete martial art learned from his father. Being complete with the two swords, he decided to rename himself "Kunou Seishiro", the Kunou part of the name referencing martial arts instead of his family name.
- No Historical Figures Were Harmed: Based on the historical Oniwabanshu, but is more similar to the Shinsengumi.
- One Riot, One Ranger: Seishiro seems like this, going against the Razor Trio by himself (and especially against Tohma) without any help and without the It's Personal factor.
- Orange/Blue Contrast: The Blue to Tohma's Orange, representing the cool blue.
- Red Oni, Blue Oni: The Oni to Tohma's Red.
- Rival Final Boss: Tohma.
- Sibling Yin-Yang: The Yin to Tohma's Yang.
- Shout-Out: His calm personality and moon-related moves are similar to The Last Blade's Moriya Minakata, but with blue instead red.
- Solar and Lunar: Exhibits a moon motif.
- Spectacular Spinning: Very fond of circular and round slashes.
- Speed Echoes: Can do this, followed by a quick attack.
- Sugar-and-Ice Personality
- Tall, Dark, and Handsome
- The Stoic
- Took a Level in Badass: Was already a badass but after the game's final battle, he takes the name Kunou Seishiro and becomes a Game-Breaker separate selectable character.
- You Killed My Father: Somewhat subverted, in terms of the fact that Seishiro seems more concerned about getting back his father's sword and proving his superiority, than avenging his father's actual murder.
One of the most loyal servants to the Bafuku government and a life-long friend of the master swordsman Kuki. He has served as a samurai for many years, living to protect his master. He used to train under Kuki's tutelage and there met with the younger samurai such as the young hopeful Sakaki Jushiro and the two sons of Kuki, quiet Seishiro and fiery Tohma. All of whom helped him retain his youthful spirit, especially Jushiro who he became best of friends with. Things however have since gone bad, with Jushiro's apparent betrayal of the government and Kuki's death at the hands of his son. Being the most experienced samurai, he is naturally given the dangerous mission of retaking control of Riten Kyo and terminate all the rebellious factions there. Along with Seishiro, he heads out to complete his mission.
- Benevolent Boss: Unlike his partner, he is sympathetic to his lesser ranked peers that are stationed at Riten Kyo and tries his best to moralize them with the promise of returning home.
- Big "WHAT?!": He yells out a loud "NANJATO!?" when defeated.
- Boring, but Practical: Unlike every other character's colorful moveset, his own consists of thrusting, slashing or lifting up the enemy at most.
- The Cameo: He has an in-text cameo in the Feudal Japan game of Days of Memories series.
- Cannot Talk to Women: To a certain degree. Since he spent his whole life away from the opposite sex, Jin-Emon is very nervous around women.
- Casanova Wannabe: Or seems like it around Saya (hinted as being reciprocal in his ending).
- Expy: Takes on Jubei's role of an old-fashioned shogunate samurai.
- Failure Is the Only Option: In his ending duel against Jushiro.
- Height Angst: Stated in his bio. Probably a developers' joke, since he's the Long-Range Fighter.
- Heterosexual Life-Partner: With Kuki and Jushiro.
- Honor Before Reason: Steady loyal to his master and the traditions of samurai.
- Meaningful Name: Translates to something akin to "swift gate guardian of the flower cluster".
- Older Sidekick: Although, technically he is Seishiro's superior.
A young, talented government samurai, he was sent to train under the legendary samurai Kuki, where he trained alongside Seishirou and Tohma. Both were distant towards others, so Jushiro mainly developed the best of friendships with Jin-Emon Hanafusa. Jushiro also met and fell in love with a female samurai named Karen, but both Karen and Jushiro were loyal samurai and Karen decided to put duties before personal happiness as was expected of her. When it was learned Oboro had designs on the princess, Karen offered to be the princess' Body Double in a trap. However, Oboro's power was more than expected and Karen along with the soldiers involved were slaughtered. Jushiro was the first to arrive at the site and when others found him alone, he became the prime suspect. Leaving the government, he went into hiding on Riten Kyo. Forming the "Atom Rebels", along with Rinka and Saya, he becomes marked for extermination by his former employers. He later modified his sword with parts of gun he picked up from Oboro's party which killed Karen.
- Blasting It Out of Their Hands: One of his special moves.
- Bullet Dancing: Thanks to his hidden machinegun.
- The Cameo: He has an in-text cameo in the Feudal Japan game of Days of Memories series.
- Combos: Most of his normal attacks can be followed by an extra shot.
- He Knows Too Much: As a traitor and former member of the secret Oniwabanshu, Jushiro must be assassinated.
- Iaijutsu Practitioner: A weird version. While he can quickly unsheathe his sword to slash, he uses it mostly for gun-related functions.
- Jade-Colored Glasses
- Loveable Rogue
- Meaningful Name: His name means "wandering musketeer", and his inherited surname is a reference to the sakaki tree. His original surname means "snake", while his name was written as the more generic "fourteenth son" but pronounced as "southeast".
- Meaningful Rename: Used to be Jushiro Tatsumi, but changed his family name to his deceased lover's to protect his identity and as a keepsake.
- The Mourning After
- Moveset Clone: Averted. He's the only main character in the game with no moveset clone.
- No Historical Figures Were Harmed: Very loosely based on Ryoma Sakamoto, an expert swordsman who famously carried a revolver and aimed to overthrow the shogunate.
- Rebel Leader: Of the Atom Rebels, even if it is basically just a small number of people.
- Rebellious Spirit
- Recoil Boost: He can stab with more force thanks to the gun recoil.
- Roaring Rampage of Revenge: Against nearly everyone; Oboro for killing Karen, Tohma for killing his master and the Bafuku for sending Karen on the mission and thinking he was responsible for the massacre because he was the first on the scene.
- Spoiled Brat: His opinion about Seishiro (and certainly extended to Tohma).
- Swiss-Army Weapon: The handle of his sword is a pistol.
- Vigilante Man: He made his own vigilante group after becoming a deserter of Oniwabanshu.
- We Used to Be Friends: With Jin-Emon, due to political alliegances. Even so, they aren't really enemies.
The proud daughter of the honorable and wealthy Yoshino family. Unexpected jealousy and betrayal among the Shogunate lead to the Yoshino bloodline's economic collapse as well as its members being sent to Riten Kyo, to slowly fade from history and society. However, Rinka returned from her secluded training and finding what was left of her family, decides to fight back, joining Jushiro and Saya, in the "Atom Rebels" anti-shogunate group.
- Adaptation Inspiration: Although she isn't playable in any other games, a M.U.G.E.N version of her exists on the net.
- BFS: Not really that big compared to most BFS's but literally much bigger than a 5'1" girl of her size could yield effectively in combat.
- Breakout Character: After only appearing in this game, Rinka comes back in the Edo version of Days of Memories series.
- Cherry Blossom Girl
- Clear Their Name: Rinka joined the "Atom Rebels" as a means to reestablish her family's honor and free the island.
- Iaijutsu Practitioner: Can do various counters from the draw.
- Meaningful Name: "Cold flower from Yoshino"
- Petal Power
- The Revolution Will Not Be Vilified: A member of the anti-Bakufu Atom Rebels, although she leaves the cause in her ending.
- Ridiculously Cute Critter: Her blueish mouse friend named Tetsunosuke.
- Shoryuken
- Stance System: Most of her moveset comes from stance-started combos.
- Tsundere
- Waif-Fu
- You Killed My Father: Holds a grudge against the Shogunate.
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