he's not necessarily literally the protagonist or literally one particular trauma. He's a symbolic manifestation of everything the protagonist is trying to escape.
Which makes the giant red ❓ on his face kinda perfect.
It's not necessarily saying “I don't know who I am.”
It could be saying:
“You don't know what I'm going to become.” 👁️❓
Btw I'm talking about the "?" Guy in a broken dream