|Occupation||Soda, Snacks, and Treats Officer|
|Appearances|| Operation: T.R.A.I.N.I.N.G.|
|Cameos|| Operation: G.R.A.D.U.A.T.E.S.|
"You said you wanted to fight adult tyranny, I heard that the Code Module contains information on every Kids Next Door operative, who knows what Father can do with information like that. Now's your chance to stop him, now's our chance."
Sonya, a.k.a. Numbuh 83, is a 7 year old KND operative. She is "Soda, Snacks, and Treats Officer" of Sector W. She is a friend of Tommy Gilligan (from his days training at the KND Arctic Training Base and Prison) and Numbuh 84.
Sonya's usual outfit is a pink and white blouse, red skirt, earrings, and purple shoes. She has blonde hair put up in ponytails, with the ponytail holders being red. She also wears two purple bracelets on each of her wrists.
Sonya was introduced in Operation: T.R.A.I.N.I.N.G., where she, Tommy and Lee undergo training from Numbuh 60 at the KND Arctic Base and end up single handedly defeating Father when an unexpected surprise attack occurs. She would later appear in Operation: I.N.T.E.R.V.I.E.W.S., alongside fellow Sector W members Lee and Harvey to take part in the Delightful Children's scavenger hunt.
Her defining characteristics are her beauty, her fear of the dark, and violent, almost demonic temper, despite her outwardly nice and shy behavior. On multiple occasions, she enters a violent rage and beats up a villain when they threaten to lock her in a dark room.