Кашю Кійоміцу

The uchigatana that is said to have been used by Shinsengumi's Okita Souji.

Perhaps because he was born in an impoverished environment, he believes that as long as he keeps himself pretty he will be loved by his owner. Seemingly the polar opposite of Yamatonokami Yasusada with whom he quarrels all the time, they are good friends in reality.