"Northern Light" is the default name for the Rehabilitation Center. You can choose to rename it, of course.
We did see Chloe's fey forms once, when she saved Gwen and the MC from the Cupid. I don't think she ever whipped it out canonically after that, but it was an option when you were "naughty" with her. The assassin was another fey that Chloe saved us from. Because she is AMAZING. Chloe's Cupid and Assassin forms were gained when she absorbed those fey to save our sorry asses.