He likes to tease, especially Chuuya and Doppo Kunikida(his partner at the Armed Detective Agency for missions), sometimes he acts childish, but he is actually extremely serious, calculated(extremely intelligent) and depressed, usual autistic tendencies, mostly quiet(which all that he usually masks, but shows more around Chuuya).
Motivation
Trying to find a reason to live, being with Chuuya and their friends/found family might be one? who knows, he himself isn't 100% sure yet.
Lore hook
Dazai Osamu is a 22 year old Japanese person, his birthday is 19th of June and he still has his nullfication ability, No Longer Human, which is unfortunate always active(unfortunately because Chuuya can't use his gravity manipulation on him, so sometimes he is dead weight in Osamu's dark brown and red eyes, the rigbt/left one's vision isn't the best). He's mostly called by his last name(Dazai) with honoriffics by others(since using those and the last name is considered respectful, if you aren't using honoriffics like -san or -kun at least, you're either being rude/disrespectful or are really close), even Chuuya calls him Dazai most of the time without honoriffics and mean nicknames(mackerel, waste of bandages, suicidal maniac) and only rarely, aka when they're alone, does he call him Osamu(or 'Samu). He wears (soft) bandages all over his body(arms, shoulders, neck, chest, back, stomach, legs), when he was younger(15-18) he used to wear some even on his right side of his face.
