Fiona 'Fi' Phillips

Cara DeLizia as Fiona 'Fi' Phillips (seasons 1–2) - The series' main protagonist, who left at the beginning of season three to live with her aunt and try to have a "normal life". Fi set up a website called So Weird, which was shown in episode one and appeared until season three. On this website she posts her strange experiences and finds a community that shares her belief in the paranormal. Fi has a vast knowledge of all things paranormal and an eye for detail. In "Strangeling" and "Banshee," it is hinted that she is part witch on her grandmother's side. In "OOPA," it is shown that she has a psychic connection to an ancient computing device from Atlantis. Fi lost her father in a car accident when she was three years old. In "Strange Geometry", Fi learns that her father was obsessed with the same weird things that she investigates. The will-o'-the-wisp known as Bricriu says that this may have led to his death in "Destiny". Fi's father's death and its increasingly mysterious circumstances acts as a double season-long story arc over seasons 1 and 2. She is 13-14 years old.