No Abridged No Life (No Game No Life Abridged)
cou for Tet
Tet is the God of Disboard, and the reason Sora and Shiro are sent there. He is basically a god in a child's body; loving to play, laugh, and above all...make horrible jokes and puns that very few people will get. If you voice him, do know that he will have a much darker side later, so you'll have to be able to change between his happy go-lucky voice, and a dark, intimidating voice.
*Announcer-like* "Welcome you two, to the world where virtually anything can happen! Haha...get it? Cause you're in a virtual...ah, fuck it."
*Surprised* "Oh my me! You two are amazing at chess! You will be perfect in my world!"
*Intimidatingly* "Moving your pawns into position, I see. Well then, I suppose it's my turn on the board, now. Apologies, Sora. But not even you can withstand the queen's wrath."
Go for a semi classy dude in anime. Or a serious but relaxed character who gets his own plot point. You'd probably win.