Meredith NicEssus
A wayward faerie princess living in Los Angeles under the assumed name Merry Gentry, working as a private investigator and apparently having a lot of fae sex.
Where is she from?
Meredith NicEssus is the main character of the Merry Gentry novels by Laurell K. Hamilton, the writer of the Anita Blake series. I haven't read the series (I'm not the demographic) but evidentally it's a good example of a particular sort of dark fantasy fiction, so... more power to it. It's never been adapted (and if the level of erotica inherent in the series is as reported... it might not ever be), so here is some fanart I found. I couldn't find the original artist of this fanart, but it was colored by deviantartist Theanyanka.
Comic Appearances
GND 283 - Sarah is certain Christine's invoking of paranormal romance can't be accurate without a inter-species love triangle, (and Jacob never called back). Unfortunately, she finds Jareth being chatted by Princess Meredith NicEssus. (also her car is picking up bad habbits from Crowley's bentley)
GND 287 - Sarah looks for Jareth, gets directions from Shadow Moon, and instead finds Spike. (and better not have save him from Meredith)