Astro is a light aqua Toon with his face resembling a crescent moon. The right side of his face is pitch-black with a white star-shaped eye. He wears a cornflower blanket wrapped around his torso, obscuring his four arms to the point that they are barely visible as faint furrows in the blanket. However, his blanket is still short enough that it reveals his legs that are the same color as the crescent moon side of his face. There is an indigo stripe that goes horizontally around his blanket.