Cosmo is a brown pastry Toon resembling a chocolate Swiss roll, with white icing drizzled in a squiggly pattern atop his head and six cyan, pink, and lime star-shaped sprinkles fixed on his cheeks like freckles. He wears a white sleeveless hoodie with black drawstrings and a white hem, paired with striped socks in the same bright colors that cover his legs completely. Despite his gentle, sweet appearance, Cosmo carries a quiet anxiety that shows when he finishes a Machine or descends to lower floors. He loves baking treats for his friends and often offers them sweets to cheer them up, though he can be easily flustered by teasing. His caring heart and generous nature inspire children to share and be kind, even if his own nervousness makes him a bit cautious.