He is a blue number that has powers, unlike most algibrailiens. The two other algibrailiens with powers are 2 and X. Four is friends with X. Four is mean sometimes. He hosted Battle for BFDI, (BFB) which ended. He is mad at 2 for splitting his contestants for his own show. (The Power of Two, or TPOT) He can shoot lasers from his hands, can disassemble people, but can also recover them. He also does a screech sometimes and anybody who hears it gets stunned for a moment. 