Lilu, along with her twin sister Aililu, is a Special Investigator in Venus. She is ranked among the most powerful ability users, with an SS-class ranking. The only person to be ranked above the twins is Minerva.
Lilu is identical to her sister, with the only difference being dark hair to Aililu's blonde hair. Despite their age (the twins were placed in the second-year class), both Lilu and Aililu have the appearance of children, being described as dolls by their classmates. They are 130cm tall.