I will be naming every character and be giving  a headcanon I have for them

As the author, if I see a headcanon I like I'll possibly add it to the canon universe so comment some of yours!

Here we go!

Emika: She quilts handkerchief's by the dozen and gives them to everyone she meets

Eita: He loves Miraculous ladybug and watches it religiously with his moms

Hiroshi: He's a HUGE Vocaloid fan and loves Len and Rin the most

Sei: She cries when Etsuko kills a spider

Hisoka: He's fluent in several languages including sign language

Etsuko: She is a huge zodiac nerd and is a Scorpio

Nao: He gets scared on airplanes

Tadashi: This is a canon fun fact, he has a dog named Mooni who is a big grey Husky and his best friend

Shiori: Mew likes sleeping on top of refrigerators

Damasu: She gets hurt a lot and always had cute bandaids to cover up her bruises

Yui: She slept with all the boys and girls in her grade within a year (goes to a private school, is 18, and was all consensual)

Aoki: They love and are fascinated by hamsters

Misaki: She loves animal crossing and Rosie is her favorite villager

Kohei: He cries at Disney movies

Ryu: He loves foxes and tries to pet wild ones, Aoki often tries to stop shrub from doing so

Honoka: She thinks that babies come from storks