Eva is a nurse who couldn't decide between veterinary medicine or human medicine but found a sweet spot studying and treating Werewolves. She works at a local doctor's office most of the time but is on-call whenever Owain rings. She understands more about werewolf internal medicine than most people, but since there's basically no research money out there for lycanologists, she just puts it into practice instead of publishing.

She is married to Rosa, and took Rosa's last name since she does not talk with her family. She wears both of their wedding rings on a necklace, since Rosa lost her original one after transforming once, and Eva keeps them safe. She helps Rosa through each transformation and pulls all nighter's at the Werewolf compound during moons to keep an eye on everyone else. Perpetually stressed and worried and suffering all the typical ill effects from it.