Rhys and Fiona are the stars of Tales from the Borderlands: two wildly different characters both out for their small slice of Pandora's riches. Rhys is a slickly dressed Hyperion employee, sporting a company vest, crimson skinny tie, and a mechanical appendage where his right arm should be--which he can use to hack loader bots into doing his bidding. Fiona is a dapper con-artist who uses her words to bend people to her will. We don't know how players will switch between these characters, but both will be playable at some point.
Having two characters allows the team to tell a story from multiple perspectives. Harrison Pink, lead designer on Tales from the Borderlands, referred to the classic Akira Kurosawa film Rashomon as an inspiration for the narrative. Both Rhys and Fiona have their own version of how events take place--and, like every citizen that lives on Pandora, will lie, cheat, and steal to get what they need to survive. As such, their accounts may not always be entirely… accurate.