Meg Masters is a college student from Andover, Massachusetts, and has a younger sister. Her phone number is 312-555-0143 (312 is a central Chicago area code). She was possessed by a demon around October 2005.
Kim Manners handpicked Nicki Aycox for the role of Meg Masters.Supernatural The Official Companion Season 1, p. 140
Nicki added sexuality to the character. "Kim and everybody else allowed me to have complete creative run... I wanted to have Meg very stylized and I think that's definitely something I brought to the character." - Nicki AycoxSupernatural The Official Companion Season 1, p. 140
Nicki thought that "Jared and Jensen are absolute dolls to work with."Supernatural The Official Companion Season 1, p. 141
Nicki's character was not just an evil monster. "I think it's really important to see that this is just a young girl who was trapped in this demon body, doing all these horrible things, watching it almost like an out-of-body experience. And you see that in the last episode when they finally exorcise the demon from her body and then she's just broken and she dies, and admits all these awful things that she couldn't control. It was very important too, I think, to really show that vulnerable side, because all the way through the arc you don't really see her very vulnerable - she's always sharp-tongued, witty, smart, and always just trying to get what it is she needs and get what she wants. So that, to me, was the most important moment." - Nick AycoxSupernatural The Official Companion Season 1, p. 140
In Shadow, her address is listed as: Masters, Meg 13 Oakwood Drive Andover, Massachusetts 978-555-0103