Member of the Rat Pack. Luna is the goth kid, loves black clothes, loves the dark, loves shadows, all of that good stuff. She strikes me as a prototypical twilight cleric, if only she could be arsed to act in servitude of a god. That takes work, and sounds like more commitment than she’s willing to deal with.
To be fair, she’s not all edges, she’s just a real fan of the darkness and thrives in it. If the pack is ever trying to pull some night time shenanigans - and they often are - her skillset is invaluable to keep them all unseen in the shadows.