i found a name for him
he goes by Paralysis and ้บป็บ (Mahi)
still writing his story and making his actual form
but right now, Mahi is a sleep paralysis demon that feeds off the fear of his victims while they're stuck in paralysis (bit more info in replies)
he's only visible to his victims and is able trick the mind into seeing a different character than what he really is, think of his actual form like that one shadow alternate in the mandela catalogue. (just a bit different)