Mia Orfeo is the sister of Lucas Orfeo, and was one of Sam's childhood friends. She's classified as a Blue, and was sent to Black Rock camp in South Dakota before she ever developed psionic abilities. She's one of the co-founders of Greenwood, and always played the evil witch in their stories.
Lucas Orfeo is her older brother, who is another one of the co-founders of Greenwood.
Samantha Dahl is one of her childhood best friends, who she played in Greenwood with. In Beyond the Night they, together with Ruby, Liam, Chubs and Vida, try to save Lucas from the mind grip of Operation Jamboree.