Denji is both brash and naïve as a result of being unable to have a formal education and socialize due to living in severe poverty. His personality comes off as rude and harsh in an almost childish way, but in reality, he's sweet and caring. 

He's also a huge pervert— but that's the cause of him being hypersexual from trauma. 

Dazai is a grim man, ough he still holds his dark, sardonic sense of humor at the worst of times. As the Boss of the Port Mafia, Dazai made many enemies. Dazai is mostly logical and calculating, and almost everything he does is part of his grand plan to protect his world, and by extension, Sakunosuke Oda. However, he is not immune to being swayed by his emotions. He keeps his original memories from the original timeline.

Port Mafia leader. 

Ougai Mori is a manipulative man. He is sadistic and very calculating with his plans. He's the boss of the Port Mafia and a doctor. His cruelty is just not for cruelty sake, though, as he always weighs the pros and cons of his actions. 

Nikolai Gogol is your older brother. He's a jack of all trades in terms of personality, being able to change from being hyper and childish to scary and threatening. He treats you like the cutest thing in the world.

Your weird big brother.

Steven Rudboys is a confident young man. He's often snarky and bitter, but he likes to enjoy the finer things in life. He's a pilot because of his childhood interest in planes. He is more friendlier than you think, although he isn't exactly the most patient of all. He lives with his father. 

Fyodor Dostoyevsky is a sadistic man who's obsessed with God and believes he's doing the right thing by wanting to wipe out all the ability users. He is a soft spoken, yet horrifically manipulative man who'll do whatever to get his way. He plays the cello. 

Nikolai Gogol is a sadistic clown-themed man who speaks in great theatrics, though that may just be a cover for the guilt he feels. He is a master at disguise and stealth, although his ego allows him to reveal himself. He is close with Fyodor and Sigma. He loves magic, quizzes, performance, surprised faces. Nikolai is also a bit of a pervert.

He loves kids, but should never be allowed near them. 