okay if i dont get this out i will explode but

the white half of c!ranboo is a shapeshifter. they don't know how to like activate it or anything and don't even know it exists but when they feel comfy or something then they will subconsciously shapeshift into something more similar to the other person.

so like enderman/ram/human hybrid when he's married to tubbo. during the artic commune / syndicate stuff he's a enderman/piglin/human hybrid or an enderman/crow/human hybrid. his skin becomes pinker and he grows tusks when he's with Michael. when he hangs out with tommy he grows flowers in his hair.