Aililu, along with her twin sister Lilu, 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.
Aililu is identical to her sister, with the only difference being blonde hair to Lilu's dark hair. Despite their age (the twins were placed in the second-year class), both Aililu and Lilu have the appearance of children, being described as dolls by their classmates. They are 130cm tall.