XXXX

XXXX is an unknown transfer student who joined Salt Middle School for a short period of time before moving away. His only appearance was ever in Mob Psycho 100 X Hito Kui crossover.

Appearance
A young school boy who has hair that covers over his eyes.

Plot
His presents gave people horrific nightmares causing people to die in real life due to those dreams. He leaves the school the next day after his first appearance and is never seen again.