Marker is a male contestant on Battle for BFDI and The Power of Two. Marker's body is mostly white, but has a purple oval symbol on his side. He has a purple cap which is the same size as the rest of his body. Marker can make shapes from his hands that are normally impossible, such as a house, Four, and a hecatonicosahedroid. Marker enjoys eating and playing with dirt and he's in a trio with Foldy (a female folded piece of blue-green paper) and Stapy (a male pinkish-reddish stapler).