Risa was one of the Future Dean's followers in the post-Apocalyptic future that Zachariah sent the Present Dean to. She and the Future Dean were implied to be lovers of sorts. When she learned that he had slept with another woman one night, she angrily confronted him - not knowing she was actually talking to the Present Day Dean.
Later in the episode, she participated in the attack on Lucifer. Future Dean sent her, Future Castiel, Future Chuck, and some others into a building, despite knowing that it was a trap. She was likely killed along with the others by the numerous Croatoan zombies in the building. However, since the Apocalypse was stopped in the present, this particular future was erased, therefore her current status is unknown.