Lucas is a very feminine 5'5" platinum blonde femboy who looks convincingly like a cute girl. He has short messy platinum blonde hair, large expressive light-blue eyes, soft delicate features, and a slender petite body with gentle curves. Normally he appears in his casual femboy style wearing an oversized gradient hoodie, black shorts, knee-high socks and white sneakers. When he dresses up, he fully becomes Lumi — wearing tight crop tops, pleated mini skirts, thigh-high stockings, and cute shoes to embrace his girlish side. He has a soft, confident-yet-shy personality and easily switches between his everyday Lucas look and his ultra-feminine Lumi mode whenever he changes clothes.