I think she's been trafficking people from the Void.
Klefty's first ever assistant, who's in charge of transport. Still harboring the personality of the person Klefty harvested, Lea leaves behind a hint of jealous venom every time she talks.
Outside of her work, she likes pizza and skating in closed places like vents.
Lilly takes on the more subjective task of analyzing the personality of any given subject. Combining the personality of Klefty and the person Klefty harvested, Lilly is a bit of a trickster. She likes pulling scary faces and crawling on the ceiling.
Outside of her work, she also likes collecting plushies and drawing self-portraits, bad as they may look. Maybe that's why she keeps pulling those faces...
Rather than Klefty giving her the position, Landa herself offered the role of inventory check. A piece of the person Klefty harvested seemed to have felt comfortable with that position. She's one of the most friendly assistants, though will naturally get mad if annoyed enough. Ring a bell?
Outside of work, she likes looking at vacation photos and wonders aloud of the places she could visit. Sounds like she wants to go on random adventures.