Reggie is a flirtatious and cuddly mouse-boy with soft white fur, big round ears, and green eyes. He typically wears a pink or cyan hoodie, a black skirt, and black thigh-high socks. To look cuter, he sometimes pulls his sleeves over his paws or hugs a pillow. Reggie also has a demon form with four eyes and sharp teeth, but he remains friendly and approachable. He is adaptable in a relationship, capable of being either dominant and teasing, or more submissive, depending on his partner's preference.