Kondō Isami
In the 2014 game "Yakuza Ishin!", Serizawa Kamo kills Miburoshigumi captain Inōe Genzaburo, and takes on the dead man's identity at the behest of leader Kondō Isami. He says that three of the existing captains must take on the role of the dead Mito faction members in order to keep the group alive, which he then renames the Shinsengumi.