Harada is a member of Shinsengumi who is also a staunch Kondou supporter.
Bald headed, with small moustache. An ex-smoker claiming to have quit smoking in Episode 119.
He is a avid Kondou supporter. In spite of his tough guy image, he gets moved to tears by macho yakuza movies like "Alien vs Yakuza", a parody of Alien vs Predator.
Harada Unosuke first appeared in Episode 9, demanding to know from his Vice Commander Hijikata Toushirou whether their Commander Kondou lost a duel with a "silver-haired samurai", and that he found it unbelievable that Kondou could have lost.
Generally, he is seen in many occasions when a large group of Shinsengumi is present. So far, he is not featured in any story arc.