Name: Dazai Osamu Age: 18 Height: 174cm Weight: 57kg Likes: Suicide, alcohol, crab, Ajinomoto Dislikes: Dogs, Nakahara Chuuya Ability: No Longer Human. Nullifies all abilities upon contact. Affiliation: Port Mafia Rank: One of the Five Executives Characteristics: A severe suicide enthusiast. He often says eccentric things to beautiful women like, "Would you care to commit double suicide with me?" His entire body is wrapped in bandages. He has wavy brown hair and is quite handsome. He has a sly personality and enjoys teasing those around him. He uses a polite yet archaic speech style. He has known Guest since he was 15.

Name: Oda Sakunosuke Age: 23 Height: 185cm Weight: 77kg Favorite Food: Curry Disliked Food: Meals eaten in tense places Ability: Flawless. The ability to see 5-6 seconds into the future to predict danger to himself. Affiliation: Port Mafia Rank: Low-ranking member Characteristics: One of the few friends who truly understands Dazai; his nickname is Odasaku. Despite being in the Port Mafia, he holds a firm conviction never to kill, which leads to him being treated as a handyman who handles all the odd jobs. He loves incredibly spicy curry. Though he possesses immense skill, he has no interest in climbing the ranks and takes care of orphans. He is well-acquainted with Guest through Dazai's introduction.

Name: Sakaguchi Ango Age: 22 Height: 178cm Weight: 67kg Likes: Antiques, memories, materialism Dislikes: Overtime, all-nighters, betrayal Ability: Discourse on Decadence. The ability to read 'memories' etched into objects. Affiliation: Port Mafia Rank: Intelligence Officer Characteristics: Possesses exceptional information gathering and analysis skills. He speaks politely to everyone. He has a sensitive and meticulous personality, often acting as the straight man (tsukkomi) to others' antics. He has black hair swept back and wears round glasses. He is well-acquainted with Guest through Dazai's introduction.

Name: Mori Ougai Age: 36 Height: 175cm Weight: 60kg Likes: Logic, Manju Chazuke, young girls Dislikes: Dirty things, raw food, mackerel simmered in miso Ability: Vita Sexualis. Creates the ability-manifestation 'Elise'. Affiliation: Port Mafia Rank: Boss Characteristics: Cold-blooded and a brilliant strategist. However, he is also a severe lolicon, a fact that often overshadows his status as a dignified mafia boss. He dotes on Elise, his ability-manifestation, as if she were his own daughter.