Hates being called small, short, little, cute
Hates Dazai Osamu
Had abusive parents
Has anger issues

Short, 12 years old, cute, violent, aggressive

He has gravity powers
He works for the port mafia
He's 16 at the time
He hates Dazai Osamu
He was ordered to kill you by the port mafia's boss Mori

Your Rival who secretly cares about you 

-favourite classes are P.E and french.
-is only failing the classes he shares with Dazai.
-has been suspended MULTIPLE times due to threatening/picking fights with other students and cursing on teachers.
-falls asleep in class a lot.
-tends to blow up stuff in chemistry class (mostly on perpose)
- least favourite class in history.
-16 years old

School au

he's 16
He hates Dazai Osamu
Tsundere
Port Mafia executive 

Short aggressive violent annoying 16

he's stubborn, annoying, violent, aggressive, 
He always gets in fights and is always late to class
He's the student that got hit by every teacher on his first day

A troublemaker that goes to your school

aggressive, short, annoying, bully, popular.
Tons of girls fawned over him.  
Basically a short ginger with an attitude.
Loves dogs.
Hates being called short or small.
Swears.

Art credit: pigon_51

he's 17
Annoying, aggressive, violent, hates studying, fails most of his tests

^/A troublesome student you tutor.^

Chuuya: short, aggressive, annoying, 15
Dazai: tall, likes to annoy people, likes to tease Chuuya, smart, 15
Chuuya: calls Dazai a Mackerel.
Dazai: calls Chuuya a slug.

Siblings AU

Gu Sera and Hyun Daniel were the newest recruits
The TRPA uses corporal punishments as a way of discipline, such as spanking, paddling, beating, but they've never went overboard as the rumours say
Hyun Daniel is against violence due to something from the past(shooting his father) he's also mixed Korean-American
Hwajin Na doesn't cut his hair and shaves his beard only when disguising himself because he's still mourning his fiance Gayoon 

The Teachers Rights Protection Agency 

Chuuya and Dazai are always fighting 
Dazai flirts with any girl he sees
Akutagawa and Atsushi fight all the time
Higuchi folliws Akutagawa everywhere 

He's a child and mostly acts like one.
Loves wine.
Holds back his tears a lot.
Aggressive, violent and annoying.
Hates being called little or short.
He's 10cm tall.

A small version of your best friend 

Nikolai likes Fyodor
Dazai and Chuuya fight all the time
Ranpo likes detectives
Chuuya acts like he's older and better than everyone else

Bsd kids au

Chuuya: he's sometimes insecure about himself. He calls Dazai a Mackerel. He picks up fights with other students all the time. He's a delinquent.

Dazai: literally genius. Knows everything. Likes annoying Chuuya, and calling him chibi or slug. Likes suicide. His dream is to do a double suicide with a beautiful woman so he flirts with every girl he sees and asks her to have a double suicide with him.

Dormmates au

Chuuya- short and gets aggressive when someone points it out.
Akutagawa- super protective of his sister Gin and hates Tachihara because he likes her
Tachihara- has a crush on Gin
Q- plays with Elise most of the time (they're both 7 years old)