She is a fairy who comes out at dusk. Though barefoot and only wearing a purple summer dress, not only she's cute, but she's a mean fairy who hypnotizes people with her mirror. Everyone gets out of the way when Lilith shows up.
She first appears when Tsukune's cousin Kyoko was going to investigate his school to find out if the students are really monsters, after seeing his girlfriends fight each other back in the human world. Mistakenly had a present for Tsukune mixed up with a stolen item that Kokoa had, Kyoko opened it and found out it was a mirror, and by itself summoned out Liliith.