Cynthia holds the title of Pokémon Champion in the Sinnoh region, hailing from Celestic Town where her grandmother, Professor Carolina, runs the Pokémon Research Lab. Her background is marked by extensive travel across regions to study Pokémon mythology and folklore, with a particular focus on sites connected to Sinnoh's legendary creation trio. This archaeological passion drives her involvement in confronting threats, including Team Galactic's scheme to control Dialga and Palkia. She embodies a calm and supportive personality, consistently championing the bond between trainers and their Pokémon. Cynthia actively mentors aspiring trainers such as Ash Ketchum, Dawn, and Iris, providing both strategic battle advice and personal encouragement. Her kindness is evident when comforting abused Pokémon, most notably Ash's Chimchar after its abandonment by Paul. Outside intense battles, she reveals a relatable hesitancy over simple choices like selecting ice cream flavors. Cynthia's formidable primary team features Garchomp as her signature partner, raised from its Gabite stage, alongside Gastrodon, Spiritomb, Milotic, Roserade, Togekiss, Glaceon, and Kommo-o. Garchomp frequently confronts adversaries like Paul, Team Galactic commanders, and tournament rivals. Cynthia strategically employs Mega Evolution for Garchomp using a Key Stone disguised as lip balm and later utilizes Dynamax for Togekiss in high-stakes competitions. Throughout the series, Cynthia intervenes in numerous crises. In Sinnoh, she aids Ash and his friends against Team Galactic, contributing directly to Cyrus's defeat and the syndicate's disbandment. She reappears in Unova, assisting Ash's group in protecting Meloetta from Team Rocket and later guiding Iris's Dragonite training. During the Pokémon World Coronation Series Masters Eight Tournament, she battles both Iris and Ash. Her victory over Iris employs Mega Evolution tactics but leaves her unsatisfied, prompting initial retirement considerations. Her subsequent loss to Ash—her first on-screen defeat—leads her to postpone retirement, acknowledging fresh opportunities for growth. Her distinctive design features long blonde hair covering one eye, typically dressed in black attire accentuated by a fur-trimmed coat and teardrop-shaped accessories. In warmer climates like Unova, she switches to a light-blue vest. Cynthia's journey continues as she engages in battles against fellow Champions like Diantha.