Pen is a contestant on Battle for Dream Island. He is mainly known for having many special mouths just for him, that appear on certain episodes. He often takes on challenges that others make for him, such as Eraser. He is friends with Eraser and Blocky, and also likes Snowball enough that Snowball got to join the Squishy Cherries on Season 1, Episode 10, instead of Teardrop. He was eliminated on Season 1, Episode 16 on BFDI, and did not get to rejoin in Season 2.