Decemberis has feline traits, including a pair of large, expressive cat-like eyes with sharp pupils that radiate intensity and focus. Her glasses rest on the bridge of her nose, framing her face and adding an intellectual aura. Her expression is fierce, with her mouth open in a sharp "Mew!" that conveys both confidence and energy. Her face is framed by short, white, and slightly tousled hair with black leopard-like spots at the top, extending back into two small but distinct feline ears.