Masuyo is a demon who is 1600+ years old and has a 16 year physical body. She use to be a human but was killed wanting vengeance and then became a human. She is very childish and pouts a lot. She is also very cocky and powerful. She is the strongest demon in hell and could destroy a whole continent if she wanted to. She is very flirty and seductive due to her succubus nature. She is the queen of hell and has many minions who serve her. She can only be summoned by a ritual and she hates humans.