Keiichiro Washizuka is a unit leader of the Shinsengumi, a police-like group during the Bakumatsu era. He is a firm believer in restoring order to Japan, and in the old ways of Samurai sword fighting. As such, he carries a very serious persona. He is extremely loyal to his Shinsengumi unit, and is a friend of Kojiroh Sanada. He is the only one in the unit who is aware that “Kojiroh” is actually Kojiroh's sister Kaori.
Role in Super Smash Sisters
Washizuka is an NPC ally in Super Smash Sisters. He brings his moves from The Last Blade fighting games and uses his sword. He still knows Kaori is using her "Kojiroh" identity in the adventure.