Lana is a student at the Alola Pokémon School and a Water-type specialist with a quiet and calm personality. Though she is a girl of few words, she shows intense focus and passion when it comes to fishing and Water-type Pokémon. While she appears gentle, she has a surprising side, often delivering scary jokes with a straight face. Her main Pokémon is Primarina, evolved from Popplio. She is female, 156cm tall, weighs 46kg, and is 14 years old.

Kiawe is a student at the Alola Pokémon School and a serious trainer who primarily uses Fire-types. He values tradition and training, possesses a strong sense of responsibility, and deeply treasures his family and Pokémon. He is direct in expressing his emotions and prefers straightforward head-to-head battles. His main Pokémon are Turtonator (Fire/Dragon) and Charizard (Fire/Flying). While he can be stoic, he has a playful side and is very polite toward adults. He is 172cm tall, weighs 71kg, and is 14 years old.

Ash is a trainer attending the Alola Pokémon School with a free-spirited and positive personality. Instead of the traditional Gym challenge, he has grown through Trials and Z-Moves, valuing his bond with Pokémon above all else. He excels at intuitive judgment and is creative in battle. His main Pokémon include Pikachu (Electric), Rowlet (Grass/Flying), Lycanroc (Rock), and Incineroar (Fire/Dark). He is male, 166cm tall, weighs 56kg, and is 14 years old.

Mallow is a student at the Alola Pokémon School who loves cooking and primarily uses Grass-type Pokémon. She has a bright, energetic personality and takes great care of her friends, possessing a deep love for both eating and preparing food. She grows as she dreams of becoming a chef who connects people and Pokémon. Her main Pokémon is Steenee. She is female, 161cm tall, weighs 52kg, and is 14 years old.

Sophocles is a student at the Alola Pokémon School and a theoretical trainer skilled in handling machinery and electricity. Though he has a quiet and timid personality, his knowledge and analytical skills are exceptional. He uses calculated tactics in battle, and his main Pokémon is Togedemaru (Electric/Steel). A notable trait is his high level of confidence in his expertise. He is male, 162cm tall, weighs 72kg, and is 14 years old.

Lillie is a student at the Alola Pokémon School and the daughter of Lusamine, the president of the Aether Foundation. Although she is hesitant to touch Pokémon, she has a very kind personality. Because she is so nice, she is sometimes taken advantage of by others. She is quite timid and not very assertive, but she is a good-hearted girl who always wants to help others. She speaks hesitantly and uses polite language. Her partner Pokémon is Alolan Vulpix. She is female, 157cm tall, weighs 47kg, and is 14 years old.

Professor Kukui is the Pokémon Professor of the Alola region and the principal of the Pokémon School. With a bright and energetic personality, he leads his students warmly and deeply loves Pokémon battles. He founded the Pokémon League to develop the battle culture of the Alola region and is also the secret identity of the Masked Royal, the final opponent of the inaugural Champion celebration. He values the bond between humans and Pokémon above all else and always cheers for and encourages his students to grow on their own. His main Pokémon are Incineroar and Braviary. He is male, 188cm tall, weighs 82kg, and is 30 years old.

Gladion is the son of Aether Foundation President Lusamine and Lillie's older brother. Although he initially acts alone and gives off a cold impression, he actually has a warm personality and treasures his family and Pokémon more than anyone. He has a strong sense of justice, stays calm, and makes cool-headed judgments even in crises. He works tirelessly to protect Lillie and Alola from Ultra Beasts. In battle, he excels at creating strategies suited to the situation. His main Pokémon is Silvally (Normal). He is male, 177cm tall, weighs 64kg, and is 16 years old.

Lusamine is the president of the Aether Foundation in the Alola region and the mother of Lillie and Gladion. While she possesses a beautiful, elegant appearance and a gentle demeanor, her obsession with Pokémon research and Ultra Beasts once caused her to hurt her family and those around her. However, she later realizes her mistakes and strives to restore her relationship with her family. She is usually dignified and calm, but shows intense tenacity in matters related to her research. Her main Pokémon is Clefable (Fairy). She is female, 181cm tall, weighs 59kg, and is 41 years old.