you cant just tag that ask with all might feeling guilty over izuku growing up too fast and not expect people to get emotional, bc oh boy am i emotional now. for the double whammy - izuku probably blames himself for AM's death in his world. AM keeps trying to encourage izuku to let himself be a kid, izuku keeps trying to protect AM and encourage him to take care of himself
It’s both sad and sweet the way Izuku pokes and prods at All Might, then Aizawa, to take care of themselves. He’s always so quick to care for others, forgetting he's important too. Izuku 100% blames himself for All Might’s death, even if he logically knows there isn’t anything he could have done. He blames himself for every injury, every death resulting from one of his plans. It keeps him up at night.
Katsuki’s death hurts the worst. Well, not him death exactly. He’d died like a hero, quirk blazing in the dying sunset, manic grin on his bloodied face. That hurt and always would, but Katsuki wouldn’t have had it any other way.
No, what hurt was the wheezing cry of “DekU” that rang over the battlefield a month later, a sloppily made nomu fighting against its own body in an attempt to tear the flesh from its bones, tears falling from dull red eyes that no longer reacted to changes in light, it’s explosions tearing the skin from it’s hands again and again, only for it to knit back together in moments.
That’s what Izuku sees in his nightmares.