Asuramaru manifests as a short-height skinny male with a androgynous appearance, long deep violet-colored hair of feet-length with a cowlick at the top of her head and his right eye hidden by his hair. he has sharp ears, red irises, and fangs. He sports a female dress with shoulderless and tight black sleeves and adorned with a collar embellished by golden beads that veil on his neck. The part of his chest is connected to his white skirt that reveals the right side of his legs. He is also seen walking barefeet in.
If the restrain of his curse lowers, horns will rise on his head and both of his nails of hands and feet will enlarge, giving him claw-like structures.
During his time as a vampire and human, his hair were tied in a ponytail while still keeping a similar appearnce as his current self.