Clay Northwood/Strong Butch is a 14-year-old boy and a member of the RRBZ and is one of the main villain and the main characters of The Powerpuff Girls Z. He originated from the show 'The Powerpuff Girls' which was adopted by Toei Animation. The original creator of the characters and the show is Craig McCracken. His weapon is a hyper flute.
- He is voiced by Kathleen Barr.
- Clay Northwood/Strong Butch is the same character as Butch from The Powerpuff Girls.
- Butch's theme color is green.