I choose The Mimic to be the one Izuku soul enter
No one pov
The Mimic is holding Mineta by the throat and lift him up
Mimic:*disorted voice*Time to die.
Mineta punched Mimic hand, but no avail
Mimic almost torn Mineta apart, but the door burst opened, revealing All Might and he wasn't smiling
AM:DON'T WORRY! I'M HERE!
Mineta:All Might is here. We're saved.
Mimic:*disorted voice*Oh, really?
Mineta turned to Mimic and he torn Mineta body in half, killing him
A white ball emerge from Mineta body, which The Mimic grabbed and absorbed
Mimic:Yes. Remnant.
All Might froze after seeing a student dying
All of the 1A who were present saw their classmate dying
Mimic:*disorted voice*Do you really think that just because All Might is here, we should surrender? This is reality.
Tomura:The Mimic is right. This is reality.
The Mimic walked towards the entrance and towards All Might
Mimic:* Inko voice*I *Mina voice*possess*Tsuyu voice*questions?
AM:WHAT'S THE QUESTIONS?
Mimic:* Izumi voice*You stick me*Katsuki voice*beat me*Tenya voice*torn my flesh. Do you feel it?
Ochako:We don't even know you
Mina:We didn't do anything to you.
Mimic: Perhaps the next question will make you connect the dots.
AM:WHAT'S THE NEXT QUESTION!?
Mimic:*Izuku voice*Can I become a Hero without a Quirk?
The students of 1A remained shocked after hearing this question
Izumi:Oni-chan? Is that you.
Mimic:That's right, Izumi. I told you. My body had died, but my soul is restless. I swore Vengeance and I Vowed to take it.