A blonde child (?) holding a light blue balloon. He has a slightly pale face and wears a small nightcap with a ghost design on it. His outfit consists of a light blue layered shirt and brown shorts. He is always with his friend "Spooky," who is made from a yellow balloon. He is curious, childish, and very pure. He especially likes ghosts and supernatural powers, and he isn't afraid of scary things. Gus once got lost chasing a balloon and ended up at the Ghost Train. (Only Gus and Guest are on the Ghost Train.)