Erin Davis is a possible love interest for Stephen Loyal, the main character for the story "Midnight Masquerade" that is included in The Sims Pet Stories. She is a good friend of Stephen's cousin Celeste Girard and is also the person who delivers Celeste's cat, Diva, to be taken care of by Stephen. Originally, Erin was assigned to take care of Diva, but declined because Buster, her dog, "keeps using her as a pillow". She also seems interested in art, because when she was asked by Stephen to come in and have an espresso with him, she declined saying, "I'm working on a painting, so I can't right now."
Gordon is then framed by Stephen Loyal at the Masquerade and arrested. Stephen is then announced King of the Masquerade. It is up to the player to choose his queen, either Erin or Rachel Ware, which makes her playable at the end of the story.
- There is conflicting information on if there is a glitch if the player chooses Erin as the Queen. See both links in the references section. 
- She shares the same surname with the twins Almeric and Aldric Davis.