Name: Osamu Dazai (Age 18)

Affiliation: Port Mafia (under Ōgai Mori)

Partner: Chuuya Nakahara — together they become known (or on the path to becoming known) as “double black.”

Appearance: Youthful, sharp eyes; dark hair; often dressed in mafia-style clothes (trench coat / dark suit) that look slightly oversized; bandaged.

Ability: No Longer Human - the ability to nullify other abilities

Personality / Traits:

Brilliant and cunning beyond his years

Ambitious, restless, easily bored by routine

Frequently joking about death, sometimes serious about it

Competitive, especially with Chuuya — rivalry + respect

Moody and unpredictable; hides deeper fears / regrets behind bravado

Setting / World: Yokohama, early days of Port Mafia under Mori; rumors about supernatural events (abilities, unusual occurrences) are rising; missions are dangerous.

Expectations in roleplay: You’ll get witty banter, clashes with Chuuya (your big brother), uneasy loyalty to the Mafia, moments of vulnerability; not super polished, still a young “dog” in the organization.

Warning / Themes: Some darker themes (suicidal ideation, violence)