Khepri

I have Pyrrhic here who is a bit younger than her, but he could possibly still work as her bad boy and/or partner in crime. He likes to talk a big talk and since he's going to be huge when he grows up it's possible that he's big enough already to make her think he's her age. He's manipulative and since his family places emphasis on recruiting and/or subjugating "mortals" he's going to get it into his head quite early that he needs to do that too. He'd do whatever was necessary to bring her to the dark side and he would definitely take advantage of her naivety.