Four (4) is an Algebralien and the main host of the fourth season of the Battle for Dream Island series, BFB.

Four made his first appearance, alongside X, in the 2008 educational video "X Finds Out His Value", where Four helps X find his value.

9 years later, Four returns to the Battle for Dream Island series, and he, along with X, started a competition to win "a BFDI", a compilation of all episodes of BFDI and classic BFDIA. During the events of "Four Goes Too Far", Four was absorbed into Donut and did not host until "Enter the Exit", where Four returned, and ultimately resumed hosting. In "The Escape from Four", Four's show was split into two, resulting in him losing his co-host X up to "X Marks the Spot" where X was bought back. When the Announcer returned in "B.F.B. = Back From Beginning", Four was absent from hosting again, becoming part of the ground, merging into the landscape and hiding in places. He would become his normal self again in "Chapter Complete". HI!!! I edit soon Ok THX NATHAN
/fourr