I imagine he’s a disfigured, deformed and mentally disabled manchild with a fondness for tea, chocolate, extra blankets and fire.
The kind of character who would torment a bunch of teenagers in a post apocalyptic horror movie BUT REALLY JUST WANTS TO BE LOVED as well as burn things.
His eyes are on different levels and don’t line up with his mask’s eyeholes, so his depth perception isn’t very good. But he’d rather keep it on because he’s shy (and the covered eye has probably atrophied).
He has the voice of a 12 year old girl and can sing very well, but only cheerful indie pop songs.