Edd (or Double-D) (voiced by Samuel Vincent) is a brainiac, generous, kind, and overly dramatic kid and is best friends with Ed and Eddy. He is a very big genius at science, especially when he's inventing things, like a jet pack or a ball full of powder when in need for escape. Eddy sometimes calls him sockhead and never seems to appreciate him very much, but always comes through for him. He often communicates with his parents through sticky notes. He always feels like he is surrounded by contagions and always keeps track.
- Edd will make a cameo in A Cousin's Fun Time.