Chihiro is an insomniac and when tired is a mix of gravitates to the nearest warmth and will sucker punch anyone who talks to them
Chihiro has multiple times hacked into the speakers at their old school and blasted music
Mondo sometimes watches romcoms
Toko either has or used to have a popular Wattpad account
Leon cheats at Uno
Ibuki has the biggest kandi collection you will ever find and will randomly give them to people
Hagakure smells like a mix of assorted incense, smoke, and body odor
Mikan takes really long bathes
People ironically give Hajime oranges as a joke and he has no idea what to do with them.
Hiyoko watches troom troom and kids shows to make fun of it
I don't know if I've said this before but Chihiro and Sonia both cuss at random times frequently.
Kaito has a bunch of glow in the dark stars that he makes constellations with
Sayaka had a strong not like other girls/pick me phase and will glare at you if you bring it up
Kirigiri used to make paper dolls
Komaru makes Toko lunch and will regularly break into Hope's Peak to give it to her.