Who is Shay from Wake and what is their importance?

Shay is one of the popular girls in girl. She is also friends with Melinda Jeffers. Shay has a crush on Cabel, which Janie sees in Shay's actions, but also sees in one of Shay's dreams. Cabel becomes involved with Shay while he is working undercover because Shay's father is one of the big drug dealers in town.