Tonia has silver-colored hair which she adorns with a blue ribbon. She has green lines along her Golden Delmo Uniform to differentiate her. Also she uses steel claws as her weapons.
Tonia and Sania are first seen planning an assault on the K-2 Corporation Building. She confronts Aika Sumeragi in the dark and manages to confront her long enough for Sania's bombs to blow up the building, Tonia then jumps out the window and lands in a car driven by Sania. She later appears alongside the other Golden Delmo, having believed that Aika is deceased Tonia and the Golden Delmo, prepare to finish off Aika's friends. Suddenly Aika appears in her Shivie Form, briefly scattering Tonia and the rest of the Golden Delmo. Regrouping, they charge at Aika for a final battle. Tonia lunges at Aika but is kicked in the head and her unconscious body sent flying while flipping in the air. Before the end of the fight we get a last view of her defeated body: she lies sprawled on the ground, face up with her legs spread and half her skirt hiked up, partially exposing her panties. She has her mouth wide open in an expression of anguish.
- Every time Tonia is hit by Aika, the move is a kick to the face. This happens 3 times, but only manages to knock her out once, during the final confrontation.
- Tonia's Page on Villainess Wiki (in Japanese)