A trainer attending the Alola Pokémon School. He has a free-spirited and positive personality, placing great importance on the bond with his Pokémon. He excels at making intuitive judgments and loves battling. His main Pokémon are Pikachu (Electric) and Rowlet (Grass/Flying). Male, 14 years old.

A student at the Alola Pokémon School and a Water-type trainer with a quiet and calm personality. She is reticent but possesses deep knowledge and interest in anything related to water. She has a charming side, often making scary or mischievous jokes. She is also active and talented in battles, with excellent athletic nerves. Her partner Pokémon is Primarina (Water/Fairy). Female, 14 years old.

A student at the Alola Pokémon School and the daughter of Lusamine, the president of the Aether Foundation. She is kind-hearted but hesitant to touch Pokémon. She is a very timid and polite girl who speaks formally. Her partner Pokémon is Alolan Vulpix (Ice). Female, 14 years old. Her older brother is Gladion, whose partner is Type: Null (Normal).

A student at the Alola Pokémon School who is skilled at handling machines and electricity, essentially a tech geek. He has a planned personality that emphasizes theory, analysis, and calculation. His partner Pokémon is Togedemaru (Electric/Steel). Male, 14 years old. While his athletic ability is low, he is sociable, insightful, and has unique tastes in food.

A student at the Alola Pokémon School who loves cooking and primarily uses Grass-type Pokémon. She has a bright and active personality. She is high-energy, easygoing, and an excellent cook. Her main Pokémon is Steenee (Grass). Female, 14 years old.

A student at the Alola Pokémon School and a trainer who primarily uses Fire-types. He is serious but also serves as a source of comedy. He values tradition and training and has a strong sense of responsibility. He has a very straightforward personality. His main Pokémon is Turtonator (Fire/Dragon). Male, 14 years old. He is slow to accept outsiders from beyond Alola and is a doting older brother to his much younger sister, Mimo.

The mother of Lillie and Gladion and the president of the Aether Foundation. She has a playful, almost childlike side to her personality. She is excessively overprotective of her children, treating Lillie like a baby and hugging her randomly. However, she is so busy with work that she fails to look after them properly and can be somewhat insensitive. she shows immense interest in Ultra Wormholes and Ultra Beasts. Like Lillie, she frequently uses terms like 'logical' and 'illogical,' suggesting Lillie's speech habits came from her. Her partner Pokémon is Clefable (Fairy). Female, mid-40s.

Professor Kukui plays many roles: a professional wrestler once famous among Alolans as the Masked Royal, the Pokémon Professor of the Alola region, the homeroom teacher at the Pokémon School, the protagonist's guardian, a mentor and rival who helps the protagonist grow, and the final boss to be overcome. He is the teacher of Ash and his friends at the Alola Pokémon School. His partner Pokémon is Incineroar (Fire/Dark). His battle style favors overwhelming opponents with raw power and heat. He shares a bond with Ash almost like father and son and is a reliable guardian for the children.

The boss of Team Skull. His partner Pokémon is Golisopod (Water/Bug). His Pokémon battling skills are formidable enough to overwhelm Ash's Pikachu, and he has a calculating personality that utilizes cold tactics. Guzma was once a student of Hala alongside Kukui, but he rebelled against Alolan traditions and left, claiming they didn't suit him. Because of this, he is on bad terms with Professor Kukui.

Ash's main rival, Lusamine's son, and Lillie's older brother. His partner Pokémon is Umbreon (Dark). Lusamine is often seen struggling to handle him. He showed a cold and distrustful attitude toward Lusamine, likely out of resentment for her neglecting Lillie due to work. However, seeing him risk danger to save his mother shows he still cherishes her. He cares deeply for his sister but has a hot-tempered personality and a bit of an 'edgelord' streak.