Ruka is a slim, fair-skinned man who stands at average height. He possesses long, straight teal hair with dark blue highlights, styled with the bangs fanned out to the side resembling fins and two long strands framing his face, with the rest separated into four strands reaching past his thighs. He has purple eyes with gold rings around the pupil, adorned with thick teal eyeshadow and prominent lower lashes. His nails are teal.