Eris

Past

Haunted by a fear of death in any form, Eris was turned in their 40s and completely ran away from their human life. Haunt moved halfway across the world because they couldn't bear to see haunts loved ones pass on.

Present

They live in a cabin in the middle of a dense forest. Travellers lost in the woods will get to stay for the night without getting eaten, as long as they don't attempt to return, and this has served Eris perfectly well for the few decades they've lived in the area. Haunt keeps haunts social circle within vampire society, and never has to take the risk of getting attached to someone who haunt will certainly outlive ever again.
And then Oberon happened to them.

Relationships

Oberon—There's a lot that goes into their relationship. They love each other a lot.
Mercury—They hunt for humans together & tell each other everything;;; Mercury was the first to know about Oberon coming back, and has ribbed on Eris mercilessly for being Edward Cullen in real life.