King Knight

Matthew Gray Gubler

Thorn

Angela Sarafyan

Willow

Ronnie Gene Blevins

Grant

Shane Brady

Nicholas

Emily C. Chang

Echo

Kate Comer

Rowena

Felisha Cooper

Kate

Barbara Crampton

Ruth

Ray Wise

Merlin

Josh Fadem

Neptune

Nelson Franklin

Angus

AnnaLynne McCord

Karen (voice)