SpoilerIn Episode 5, it is revealed that he has a very well built muscular figure compare to his 'genius' looks
In Episode 11, he was eaten by the new enemy, "Shadow", and turned into an NPC. During that, he lost his glasses, which is something he never does.
He is destined to remain in the world without a soul, performing daily tasks like other NPCs.
In Episode 13, he disappears and "moves on" even though he was an NPC.