Heather

Heather is the protagonist's girlfriend/antagonist's former friend. Heather is really nice to people but when she's with Tiffany, she is a follower to her. In Episode 9, Tiffany and Heather are friends because Heather dated Jordan, Tiffany's enemy. In Episode 10, she now wants to take revenge on Tiffany.

References
 * She might be a reference to Ella [Paiella] since they both dated Jordan.