Colleen (last name unknown) was a Potential Slayer and, presumably, also one of the new Slayers. At some point after she had arrived she met Xander Harris. One night, he had a dream about her and her fellow potential slayer Caridad in a threesome.
Behind the Scenes
- She was portrayed by Rachel Bilson.
- According to the commentary on the episode "Dirty Girls", Colleen was named after a member of writer Drew Goddard's family.