Astro’s face resembles a crescent moon, with half his face being a very light white-ish blue, and the other half being black. His body is the same blue-ish colour as his face. He has four arms. He also wears a blue nightcap, long enough to drag along the floor. The black side of his face has a red star-shaped eye, while the other has a normal one.
Astro doesn’t want to hurt other toons, but has an urge to. His body has too much ichor inside of it, causing him to lash out in pain and aggression.