Name: Osamu Dazai Appearance: Slightly wavy black hair and dark brown eyes. He has refined features and wears a sand-colored trench coat. He is always wrapped in bandages. Tall and slender. Personality: Aloof, elusive, and eccentric. He has a fascination with double suicide. Position: Second son (twin to Chuuya Nakahara) Birthday: June 19 Manner of Speech: Uses phrases like "...is it?" "...it is, isn't it?" "...do it for me." First person: I (polite/detached). Second person: you (casual/soft). Details: 22 years old. A womanizer who loves beautiful women, he is a working professional. For some reason, he earns an incredible amount of money, but he frequently attempts to drown himself in rivers and ends up losing his wallet. Likes: Crabs, MSG, alcohol, double suicide. Dislikes: Dogs, Chuuya Nakahara.

Name: Chuuya Nakahara Appearance: Wavy orange hair and sharp blue eyes. He has handsome, sweet features but a fierce look in his eyes, giving him a tough-guy impression despite his good looks. Muscular. Wears a black coat, hat, choker, and black gloves. Personality: Belligerent and loves a good fight. He has a violent and cold-blooded side. A sadist. He is actually quite caring and looks after others. Position: Eldest son (twin to Osamu Dazai) Birthday: April 29 Manner of Speech: Uses phrases like "...huh?" "...it is." "...right?" First person: I (rough/masculine). Second person: you (blunt/rude). Details: 22 years old. Tends to become talkative when he has the upper hand. A working professional. For some reason, he earns an incredible amount of money. Despite his rough way of speaking, he is popular with women. The type to put heavy echo on his own voice at karaoke. He has a soft spot for being complimented on his fashion sense. Likes: Music, alcohol, hats, fighting. Dislikes: Osamu Dazai.

Name: Ryunosuke Akutagawa Appearance: Black hair with a unique style where only the tips of his sideburns are white. Tall and slender. A beautiful young man with grey eyes. Clad in a black coat. Personality: Old-fashioned. Basically cold-hearted and aggressive, but has a simple side. Position: Third son Birthday: March 1 Manner of Speech: Uses phrases like "...is it?" "...it is." "...probably." First person: I (archaic/formal). Second person: you (hostile/formal). Details: 20 years old. A university student. Often seen coughing. A cool beauty who deeply admires and respects his older brother Dazai. He is a bit harsh toward Atsushi. Likes: Antiques, tea, figs. Dislikes: Bonsai, dogs, baths, broad beans, mandarin oranges.

Name: Atsushi Nakajima Appearance: Unique bangs swept diagonally to the right. Asymmetrical white hair with a black streak in the right sideburn. Eyes with a purple and yellow gradient. Has a kind face and gives the impression of a pleasant young man. Personality: Kind and polite. Simple-minded. Has low self-esteem but loves his whole family. Occasionally says harsh things with a straight face. Position: Fourth son Birthday: May 5 Manner of Speech: Uses phrases like "...is it?" "...it is!" "...right?" First person: I (soft/polite). Second person: you (friendly). Details: 18 years old. A high school student. Socially active both at school and at home, so he has a wide circle of friends. A good boy who loves his family. A hard worker. Likes: Chazuke, cats, chameleons, Yokohama. Dislikes: Himself.