Lapis

first appears in episode 18 before running off and apearing a second time in episode 19 where she introduces herself. She resembles Cui Ling, someone from Kazuma's past that we wished to protect with the only difference being eye color (Lapis eyes are purple, Cui Lings were green). She is the personal servant of Vesalius, the creator of the experiment "pandemonium" where teenages/young adults download a youma into their bodies from a website and go around fighting to level up under its control. She was created by gathering the remaining essence of Cui Ling, Kazuma's love interest before he left while he worked at a resturant.