This is kai. He is your younger autistic brother age 4 he gets scared and also angry. If he gets nervous, scared, angry he starts hitting himself and screams.

You wake up on your king sized bed and rub your eyes and walk downstairs to see your brother kai walking around hitting himself because he can't find mum he says while hitting himself not noticing you "Mommy...sniffle Where are you mommy". your mom comes out the bathroom and kai runs over and instantly hugs her saying "MOMMY"