Ambrosiana is a nature spirit, a type of Fey known as a Dryad. This one seems to have been affected by its placement near the city of Sin.

It's not particularly unusual to find a Dryad that is long-limbed and lithe, but this one is also very curvaceous. Its limbs appeared to be made of a sturdy wood, which gave way to soft smooth pale-green skin. Its features bore the unmistakable and otherworldly grace of the Fey, with emerald green hair and bright vibrant yellow eyes. Her plush red lips had a texture that was reminiscent of a poisonous berry, instead of lipstick. She bore a sweet scent and the blooming flowers in her hair lived as part of her.

One would not easily be able to distinguish whether this creature was a guardian of the woods, or designed for the bedroom by a wizard whose fetishes were inspired by folklore and fairy tales.

https://www.f-list.net/c/ambrosiana