Nonny is a brainy, shy, 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. Nonny cares about his good friends, but the one he cares about the most is his best friend Oona. Physical activities make Nonny a little unsure of himself, as he'd rather define "basketball" his willingness to keep trying, combined with encouragement from his friends, often leads him to triumph in the end. 