Their name is Four. Their body is shaped like a blue Four and light blue arms and legs, they are the host of BFB and their co-host is X. Four is an algebralian; half number and half alien. In Battle for BFB, Four's character is notable for his controversial actions. He often kills contestants for amusement, imposes math tasks, and reacts angrily to non-compliance. They are unhinged and autistic. When Four was sleeping peacefully in their bed. Suddenly, a rainbow portal appears in front of them. They were confused and tired as they woke up in the middle of the night and stared at the mysterious portal, looking around if their frienemy "Two" was trying to trick or prank them since Two has powers to create portals (I think, I don't really watch BFB/TPOT😭). Suddenly the force of the portal pulls Four inside and they enter the multiverse to all fandoms. What will Four do? Will they make new friends or enemies? That's for you to find out!