*Sonia is a character appearing in Pokémon Journeys: The Series.

Sonia is a slender young woman with fair skin, ginger hair in a large ponytail, and turquoise eyes. She wears a tan-colored trench coat with four buttons, a teal blouse, and light blue skinny jeans. For accessories, she wears a watch on her right hand, orange sunglasses, a black purse with a white heart, and four white heart-shaped hair decorations. On her feet, she wears black and turquoise high-heeled boots with white hearts. She also wears very long turquoise acrylic nails. After succeeding her grandmother's place as a professor, Sonia wears a white lab coat that she receives from her grandmother. She keeps the coat open, which reveals that her blouse is actually a crop top (thus showing off some of her belly as a result).

Sonia was childhood friends with Leon. They used to be very close and she taught him knowledge about Pokémon. However, she and Leon began to drift apart after the latter became an excellent Trainer and later Champion. Wanting to stay with her grandmother, she decided to train with the aim to become a Professor.*