Eretria

Eretria (Ivana Baquero) is one of the main characters of the Shannara Chronicles, based on the Terry Brooks book The Elfstones of Shannara.

When Eretria is introduced we learn that she had been raised by a band of thieving Rovers. She is the bought/adopted daughter of Cephelod, the leader of the Rover band. 

Her first solo mission is to rob Wil. In order to do so, she saves him from a Troll, flirts with him, drugs his wine, and then robs him. 

Through a series of adventures and misadventures she manages to gain her freedom from the Rovers. She ends up joining Amberle (an elven princess) and Wil to save the world. 

On the show, she is clearly bi. Eretria flirts with and seduces Wil and there is clear sexual tension between them. We also found out that she once had a relationship with an elf hunter named Zora. Eretria also flirts with Amberle and has a girlfriend, Lyria, in season 2.