u/Altruistic-Dress-968

It can be easy to assume that the damage we see on Shigaraki here is from the indirect impact of Tiamat but after close examination, it's actually damage from Keraunos.

We can see many specific consistent details in damage such as his left arm being entirely burnt off, his lips gone, the whole right side of his face burnt down to bone, his nose gone, and the area around his left eye burnt down to muscle.

There's also no further visible damage after Tiamat hits either, meaning that he entirely avoided the explosion.

Maybe this was obvious but either way it's interesting.