|Romances:||Jack Pappas (ex-boyfriend)|
|Interests:||Entertaining younger guys|
|First appearance:||That's Enough of That|
|Last appearance:||Whoomp! (There It Is)|
|Portrayed by:||Bianca Lawson|
Shawna is the older sister of Duncan. She briefly dated Jack, but decided he was too young for her. They broke up in "Whoomp! (There It Is)" which is the 21st episode of season 1.