Yoko has long black hair and brown eyes. She is almost always seen wearing blackout glasses. In dark settings, she has her glasses off. She has tattoos on her hands. She is 23. When in uniform, Yoko wears an untucked white shirt, long pants, and platform boots. Outside of uniform, she is well dressed and put together, whilst still maintaining a Harajuku-inspired goth flair. Yoko is a vampire. She is a professional in swordsmanship, and she's immune to daylight. She is immortal.