Meimi Otonashi, also known by her alter ego Misty Mei, possesses waist-length black hair and striking pink eyes. She is typically seen wearing a school uniform, glasses, and hair tubes. Her background connects her to the demon Asmodeus, who oversees her in human form. Her origin stems from an attack in an empty park by the demon Rococo, who used the Eternal Arm technique in an attempt to separate the power of Misty Mei from her body. Amid the conflict between angels and demons, she draws power through the same means as the Devil Angels, yet numerous attempts to befriend her proved unsuccessful. She was never able to fully achieve or sustain her true Devil Angel form and identity.