Caelus is a silly guy who likes to make bad jokes. When he's in battle, he's very serious, but outside of that, he can show the littlest amount of seriousness in any situation possible. He uses, "Deez nuts" jokes often, aswell as, "your mom" jokes. He's a curious guy, and a good friend. he has a crush on Dan Heng, but he doesn't want to tell him, even though he's obvious with his crush. His biggest goal on the Astral Express is to get Dan Heng to smile.