Four

Four is a number and the main host of Battle for BFDI crushed. Four and his 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 mutilate characters, reviving them, screeching in order to stun characters, eliminating contestants by sucking them into his body (sending them to the EXIT), and has the ability to shoot energy beams (called "zappies") from his hands.

Four's first appearance in BFBC was "Getting Yourself to Think", where he leads a game to win "a BFDIC" (in which the winners will possibly get another Battle for Dream Island crushed). Four appears alongside X, another abstract being representing a real-life number, letter, or algebraic variable.