I watch and know what this is but:

A block of cheese grew legs, arms, grabbed a gun and pointed it at deku

My boy just found out that he’s allergic to cheese after eating an entire block. he then falls over dead.

Three of my guesses,
1. Someone threatened Deku with cheese. (Acctual guess)
2. He stabbed Bakugo and found out he's cheese.
3. He wants more cheez on his pasta because the waiter didn't put enough.☹☹☹
4. One word....Picture day (another actual guess)

One word
A o y a m a

This guy.

C h e e s e

Ayoma, it’s has to me Ayoma

AOYAMA

It could only be Aoyama