Iris, a Pokémon trainer from the Village of Dragons, journeys through Unova alongside Ash Ketchum and Cilan. Her upbringing fuels her expertise with dragon-types and her aspiration to become a Dragon Master, granting her deep insight into their behavior.

Adventurous and outspoken, Iris voices her opinions directly—often criticizing Ash’s battle tactics as a "kid" due to her high standards. Yet she balances this with genuine care for Pokémon, especially dragon-types, intuitively understanding their emotions. She confronts her fear of ice-types and cold environments when necessary.

At Pokémon Hills, Iris aids in resolving the conflict between Genesect and Mewtwo. She helps reunite a lost Genesect with its group, then protects the park’s ecosystem as Genesect claim it as habitat. She extinguishes fires when the Genesect nest ignites and supports relocating them to Absentia National Park for its suitable environment and Panna Lotuses.

Her development shifts from impatience and interpersonal friction toward maturity. While maintaining rivalries like that with ice-specialist Georgia, she reflects on her own training shortcomings. Strains and reconciliations with Pokémon like Excadrill and Dragonite mark her evolution—from prioritizing victories to valuing her partners' wellbeing. Her dragon expertise calms distressed Pokémon, including a rogue Dragonite.

Ultimately, Iris achieves her childhood ambition by becoming Unova's Pokémon League Champion, showcasing her battle prowess and mastery of dragon-types.