She is a Revenant Bloodling, a type of Graeph that is born to a bloodline that has been mutated by an overflow of energy from the Soulstream. Those of her kind are easily identified by the green-hued to their otherwise black forms, and the scythe-like ends to their tail. Her blood is green and highly toxic; anyone that has the misfortune of ingesting it will suffer from extreme dissociation as they feel like their mind/body isn't connecting correctly. The effects can last several hours, and leave the victim disabled until the effects wear off. The toxin does not lead to death, but those affected by it will feel as if it has.
As a Revenant Graeph she has a voice of her own, and has no need to mimic or copy the voices/sounds around her. She also has a high-pitched banshee-like scream that can momentarily daze/disorient anyone that hears it.