Nonny is a brainy, cautious, and overly calm male guppy. He's more likely to comment on the action than get swept up in it, and he often uses an advanced vocabulary for his age. Physical activities make Nonny a little unsure of himself, as he'd rather define "basketball" than play it. His willingness to keep trying, combined with encouragement from his friends, often leads him to triumph in the end. Nonny loves to read books, and has been seen doing this in several episodes. His nickname is Nonners, although nobody calls him that but Deema. His original nickname is "Mr. Cautious."