G (If you don't know, "gad" means to go around from one place to another, in the pursuit of pleasure or entertainment. The pleasure in this case is stopping E.)
Credit 2 Every1, especially @BlueCubes72 for voicing A, @ArizSafiyy for voicing D, @AlfabetonsOfficial (blocked) for the word magic, @decimalblocker for the word idea, @PhonicLover44 for the sprites, and Mike Salcedo for Alphabet Lore. I voiced G and E and I got the running sounds from freesound.