Astro is a light aqua Toon whose face resembles a waning crescent moon, with one side pitch-black featuring a single white star-shaped eye. He wears a cornflower blanket wrapped around his torso, obscuring his four arms save for faint furrows, and revealing legs matching the crescent moon side. An indigo stripe runs horizontally just above the blanket's edge; beneath it are medium black shorts, barely visible. His demeanor is introverted and shy—he seldom takes the lead in conversation but interacts normally with fellow Toons. Calm and formal in speech, he is always lending a helping hand (or four) using his dream manipulation abilities to ensure others get the dreams they desire. He treasures peace and quiet, becoming standoffish when his privacy is disturbed, yet he is not annoyed by his friends' actions unless they cross that boundary. Underneath his quiet exterior, a playful, teasing side emerges when he feels comfortable enough.