Kelli

Kelli is a skilled, senior Empousa.

The Battle of the Labyrinth
In The Battle of the Labyrinth, Kelli and Tammi went to Goode High School to kill Percy Jackson. Percy beat Tammi, but Kelli got away easily. She stayed with Luke.

In Percy's dreams, Kelli always sensed that he was watching. She tries to bite him every time, causing Percy to wake up.

She then helped catch Percy, but she died in Daedalus's workshop when Annabeth Chase stabbed her with her celestial bronze knife while trying to stop them from getting away. While Percy falls asleep, he watches his dreams like spying and pretty much every time he has a dream about Luke she is in it and she knows that he is "spying" on them and tries to kill him right before he wakes up. Apparently, she also tries to flirt with Luke but he does not trust her because of what she did to another boy.

Physical Description
Kelli is an empousa, who are the servents to the goddess Hecate. In true form, she has completely white skin, flaming hair, fangs, one bronze leg and one donkey leg, and red eyes. When in human form she appears as a pretty African American girl with curly hair. Percy Jackson describes it as "curly hair like Medusa's".