Eris (TLoTF)

"......My control over that form wasn't exactly the best. The other Featherpires said something about inheriting the power of one of the first Featherpires....but honestly it's been a pain in the ass. When I first transformed, many Featherpires were killed. So they sent me here, figuring it was better if humans got hurt. The Featherpire Lord also forcibly instilled hunger on me several times, wanting me to go on a rampage so that the other Featherpires would have more places to stay on earth and be able to claim their own territories. Eventually I was able to control it....but it was around that time that I was captured. They were either going to study me or kill me. Either way, I didn't want that. And then you came. .....At least whenever I killed in this form, I didn't remember any of it. But seeing you on the verge of death.......I couldn't let that happen. Not again."

- Eris explaining her backstory

Eris is the secondary protagonist of the Legend of the Featherpires franchise. She is the one who Daniel rescued from Agents 1 and 2, and saved his life by giving him some of her blood, thus transforming him into a Featherpire.