Todomomo

Forgetting they have enough kids

Kirimina

Forgetting they aren't at home and being affectionate in public

Miruhawks

Flirting too much, but it's not really a habit cuz they know what they're doing-

Iidamei

Literally anything Mei already has a habit of doing + Iida

Kamijirou

Laughing too loud

Dabi X Toga

They don't have any habits cuz they don't go in public too much

Nejitama

I don't think they have any