Four is an Algebralien that resembles the number 4 and he is the main host of BFB. They have a dodger blue body and they have cornflower blue limbs. Four exhibits very surreal mannerisms, including being able to deform or mutilate characters, revive them, screech to stun them (killing them on some occasions), eliminate them by sucking them into their body (sending them to the EXIT), and shoot energy beams from their hands. His co-host/best friend is X. He hates Two and he hates being ignored.   