This might be a little disappointing, but I’m not big on pet names. I find most of them OOC (okay, Kirishima gets away with using “babe” alright). I’ll say that I Am so into those moments when they start to use each other’s given names. So like, I think “Ei” is perfect and if we’re talking an AU set somewhere outside Japan, “Kat” is okay too.

Also just remembered this, but “Red” is good too, especially when in a Pro-Hero setting.