Saito Hajime
At first glance, he seems to be a flippant guy who’s 50% joker and 50% romcom lead, but sometimes the sharp and shrewd glint in his eyes slips through. Among the Shinsengumi soldiers, who tended toward anachronistic ideals, he believed in a flexible way of life unbound by pre-existing values.
He didn’t speak much in his later years, and passed away telling very little of his time in the Shinsengumi.