im putting all the details we have on the story into this!!!! it's basically just how everyone died and what happened afterwards, but all u need to know is that its like,,,, one incident after another.
anyways, izuku was the first to die. It's in some sort of incident, where he gets separated from his classmates and sm heroes(its implied theres a battle going on) and gets killed by villains. He bleeds out like,,, just as people show up. From there, Izuku wakes up a pool of his own blood and spends a few months in the wild before he joins a group. then todoroki shows up, he gets dragged off, they get separated, and Izuku joins snowbound. Izuku has been a cat for about,,, four, five months?? however, the timeline is very messy. like, somebody killed at the end of the timeline could have woken up before izuku(not recommended tho afdsfds)
anyways, during that battle, a few people could have died after izuku? doesnt really matter to me, but none died before izuku, at least.
todoroki dies a few weeks later. apparently the class 'stopped caring' abt izuku's death a few weeks later(do what u want w that), and goes to seek revenge on the villains. it goes well until they call backup, and then todoroki just. dies. todoroki gets reincarnated. the house burns down and he meets izuku, who does his best to help. later, todoroki drags izuku away from his current group and they travel for a while up until they get separated. He recently showed back up, though.
I don't have all of bakugou or ochaco's details rn, tho. bakugou died in a villain attack(ft. the league of villains), and ochaco,, not sure lmao. they both woke up the old fashioned way, involving just sorta awakening in a pool of blood.
but we do have aizawa!! his is like,,, extra vague. aizawa's death takes place at the v v end of the timeline, and is basically the 'end all' where the remaining characters die lmao. this is like,,, the vaguest part of the timeline bc aizawa doesnt remember(and guts doesnt have anything to add lmao), but smthing happened, and aizawa couldnt save the remaining students i guess. anyways, aizawa, like izuku, wakes up covered in blood, but is found promptly by izuku, and joins snowbound.
(notes: most of the student chars, are around 8 months old and just regular cats. u can do w/e u like, tho!!)