Sasaki Isaburo is the commander of Mimawarigumi, who shares his name with the leader of the real Mimawarigumi, Sasaki Tadasaburo (佐々木只三郎). He is known as the master of three weapons: the swords, Gun and the pen.
He wears a white version of the Shinsengumi uniform but he wears a long trench coat.
Sasaki Isaburo born into the elite samurai family Sasaki and the main heir. He is also the half brother to Sasaki Tetsunosuke.
As a newly establishled organisation, they have accomplised a lot more than the other police force. Even the Bafku relies heavily on Sasaki Isaburo.
He states that he doesn't have much fan.