Deku
You like to call him broccile boi, but most of the time you call him deku or my love.
Bakugo
AnGrY PoMeRnIaN, or boom boom boi
Todoroki
My love, or todoroki, sometimes you call him Shoto
Denki
Sparky, or pikachu (only a few times do you actually say oh hey Denki or Kamanari)
Kirishima
Shark boi, strawberry, or kiri
Shinsou
cat boi,shin (because why not) (most of the time you call him by his name)
Shigiraki
Player 1, or shiggy
Dabi
Burnt chicken nugget boi, or his name
Overhaul (kai)
you usually call him Kai, but there was one time you woke up rather tired and you saw him and mumbled a angel, he teases you for that even now.
(Doing what they call you next!)