Mister G

Mister G is a Letter Boy in The Letter People. He looks pretty much like a ghost-like monster with gum for hair. He has gooey gum (where he gets his regular sound).

Mister G is the only Letter Person whose song is not actually sung.

In his debut episode "Meet Mister G," he teams up with Miss U and Mister M to retrieve Gordon's Good Green Grapes from Godfrey the Ghost, eventually by having him play the Catching Game, and give him a stick of Mister G's gum and a goldfish as a prize.

Oddly, Mister G gets his soft G sound in "Y as a Consonant and a Vowel," but there hadn't even been a debut of Mister J yet. Eventually, he is shown to get his borrowed sound when he ends up disappearing due to a vanishing gem.