Four is an algebralian and the main host of BFB, and the host of the non-canon one-episode series, Battle for Permission to Meet 10. Four and their co-host X first appeared in the 2008 video "X Finds Out His Value". 

Four exhibits very surreal mannerisms, including being able to deform or change mutilate characters, revive them, screech to stun them (killing them on some occasions), eliminate them by sucking them into his body (sending them to the EXIT), and shoot energy beams from his hands.