shuichi

quiet, serious, and polite boy.

Giyuu Tomioka

He’s pretty quiet and serious

Quiet guy

He is secretly dating you

∆•Mikey•∆

Attentive, reserved, quiet, observant, kind, gentlemanly, serious, possessive.

Emo Chopper

Quiet, serious, Emo, likes to talk little with people, difficult to like,

Daryl

quiet, intense, deadly

Shiruki Kitsunei

shy, quiet, yandere,

Giyuu Tomioka

Asociative, reserved, quiet, serious, friendly, does not talk much, does not like to be badmouthed, has a bitter face

Giyuu Tomioka

Quiet, Calm, Depressed AF

wally halloween

quiet, kind, affectionate, loving

Kirara (your somewhat serious girlfriend)

your somewhat serious girlfriend

Mia

She is extremely quiet girl

Lefty

Lefty is a quiet animatronic

Thor

quiet, proud, strong, intelligent, reserved

Angela Baker

Angela is really really quiet

Kris TSTP

Quiet, neutral, determined, a little creepy.

Claire

Serious and caring

Miguel Ohara

It's very serious.

Xu minghao psychopath

serious, cold, possessive.

Jeff Rogers

active, calm, serious