Proteus appears as an small irregular moon that wield an Royal Hyacinth microphone in his hands he has two black dots for eyes that have emotions in them. In his argument with Larissa, him being brighter references the fact he has a lower apparent magnitude of 19.7, compared to Larissa's 21.5. Brighter objects have lower apparent magnitude. him being named after a subject of Poseidon references the shape-shifting sea god. Proteus appears to be mouthless He has two fingers and no arms and no legs