Lilith (Midnightverse)

Lily is Issei's former babysitter and his adoptive older sister. She babysat Issei before Azrael and disappeared long before the start of the series. Lily was officially introduced during the chapter, School Festivals, and Deals. It is unknown what she is and her connection to the demons as Vali has pointed out that her power as similar to that of Issei.

History
Twelve years before the start of the series, Lily was Issei's babysitter. She disappeared for unknown reasons.

Appearance
Lily is a woman who possesses inhuman beauty. She has long flowing white hair which curls slightly at the end with her bangs styled in an upward ponytail. Lily is mostly seen wearing a black dress with a pleated skirt and a black choker around her neck. Alternatively, Lily also wears a maroon dress as seen during the school festival.

Personality
According to Issei, Lily is a kind and caring person.

Trivia

 * Lily's appearance is based on Mirajane Strauss from Fairy Tail.