Okay-
so-
I have 2 theories (obviously not cannon just fan-made ones) that i thought of but when i searched them up, legit, NOTHING popped up
so i decided to share with you guys
So they are both about kirishima
One: Kirishima, Could be Ray (from tpn)
like he has the black hair down, he's only ever had mentioned his mother (which could easily be isabella) and they look similar. cause like apart from the green eyes he has everything down, cause ray was just as sad as he was in middle school, then decided to just try to be better. also, for the green eyes, He could be wearing contacts so he looks less like himself and so no one could tell and he could have changed his hair style to help with that.
and Two: He also could be the secret love child of Yumeko Jabami (from Kakegurui, and yes i know i sound like todoroki) cause the red eyes, The black hair, the usually happy personality but can get pissed off, and has an angry blonde friend.
i'm sorry if this doesn't make sense, it's like 2:00am for me and i'm like super tired-
but these are theories that i came up with a few weeks ago-
but, have a nice Day/evening/night!!