Sonny Flannery is a changeling. Godlike beings stole Sonny from the mortal realm when he was a baby. He grew up as the son of the King of Winter in the Otherworld, Auberon. As a changeling, Sonny is a surrogate child to the Faeries.
When he is in the mortal realm, Sonny lives in Auberon's penthouse apartment overlooking Central Park. Auberon sent Sonny back to the mortal world to work as a Janus guard. Sonny's job, along with the 12 other guards, is to guard the gate that separates the Otherworld from the mortal world.
When Sonny sees Kelley for the first time, he knows that there is something special about her. He is able to figure out that Kelley is not a mortal, but unbeknownst to her, she is the abducted daughter of Auberon. Sonny works to protect Kelley, who he believes is the target of an attack by someone in the Otherworld.
