Diablo

Takuma Sakamoto a.k.a. Diablo is the male protagonist of the series.

Appearance
On Earth, he has a typical appearance of a Japanese adult human man.

His Cross Reverie avatar, which is also his appearance in the other world, is a white-haired Demon.

Personality
His true personality is that of an introvert who has trouble talking to women. He gets jealous of couples in the game and uses his character Diablo to annihilate them as a form of catharsis.

As Diablo, he projects a haughty persona.

Background
He was an introvert who played the MMORPG Cross Reverie as his character Diablo.