G-Cleff and the Captain
G-Clef is Captain Tonnybrow's "musical fantasy sequence guide". He only appears once.
Who?[]
G-Clef is a G-clef in another dimension. He typically wears sunglasses and a goatee.
Why is that name familiar?[]
G-Clef is named after G-Clef in Blue's Clues: Blue Big Musical Movie.