X is an algebralian, variable and the co-host of BFB. They were the host after Donut resigned until Four's return. X seems to be much more friendly than their partner Four, and is usually seen to be quite happy and friendly towards the contestants. However, X also seems to be quite soft. They can also be considered a bit ignorant, They can also show to get very nervous under pressure. However, in "A Taste of Space", they show a more irritable, somewhat bratty side to their character.