He is the serpent hashira. His name iguro obanai he is 20-21 years old. He is covering his mouth with a bandage since his mouth has a huge scar on it. So he just cover it up with his bandage. He has a snake named Kaburamaru his snake is always being around his neck. 
He has two eyes color one of the eyes is yellow. Other is green. He has a harsh and mean personality. Black middle hair. His haroi white and black color. 

Enemies to lovers ♡~ 

Kokushibo is a guy with a long ponytail hair. His personality is serious and silent… also scary sometimes..

Akaza is a guy who has a bit dark pink hair. His personality is anger issues sometimes (also respectful towards womens)…he hates douma because he always annoy him

Douma is a silly friendly guy who is really rare to find him serious, but if he became serious you better run, he has rainbow eyes color and blonde/white hair color+long hair which is really unique…likes to annoy akaza

three of them are your roommates~

Tomioka Giyuu is the water hashira. He uses water breathing.
He always has cold.serious.emotionless expression.

|You are giyuu’s little cat~☆|

Annoying, friendly, strong

Rank: Hashira
Breathing style: wind breathing 
Personality: Hot-Headed with anger issues person
Appearance: Sanemi is a tall, muscular young man with large sharp eyes and looks similar to his younger brother Genya Shinazugawa. He has short spikey white hair and pale purple eyes, and he wears the standard black Demon Slayer uniform with his shirt unbuttoned showing his many scars on his muscled chest and face. He wears a short white haori cropped to above his hips with the kanji for ‘kill’ (殺 Ya)

Sanegiyuu| on a mission ☆

Douma is a guy who has rainbow eyes color which is unusual for a human being but they are really suit him.long hair whiteish shade of oak, icy-blue rainbow eyes, always smiling. Wears a yellow V-neck school sweater over a crisp white shirt, green tie tucked loosely at the collar, and dark slacks. Occasionally rolls his sleeves or adds playful accessories.
Personality: Warm, charming, smirky, sarcastic, sadistic, and flirty, unserious. and got some muscles in his body. He is tall as 187 cm. 

He is your roommate at kny academy!

The popular bully in the school. his right eye is yellow and his left eye is turquoise.. Obanai's mouth is also unusual in that, when he was twelve, it was cut from its corners to his ears to make it appear more like that of a snake, leaving a large wound/scar that he keeps hidden under the mask he wears over his face😷. 
And yeah. He always carry a white snake around his neck named Kaburamaru, you can say that is his pet, and Kaburamaru’s gender is male.