She makes her first appearance in "The Duchess of Dull-in-Sack", when Zoey urges Walden to leave her house, because she does not want Ava to see him. She is also shown, later on, to be quite self-aware. She knows about the problems between her parents and she also knows she is of royal descent, calling herself "Queen Ava". Ava also has a stuff animal called "Winston" and she seems to call Walden "Sir Schmidt" or just "Walden".