Susan Blu is an American voice actress, voice director, and casting director in American and Canadian productions. She is perhaps best known as the voice of Arcee in the original Transformers, a role she reprised on Transformers: Animated. She was also Dreamchip Gemstone in The Flintstone Kids. She was the voice director of Beast Wars, Teenage Mutant Ninja Turtles (2003 TV series), the first few episodes of Transformers: Prime, and most recently Ben 10: Omniverse.