A 10-year-old boy attending the Pokémon School. His goal is to become the world's number one Pokémon Master. He is passionate about battling and possesses exceptional skills. He is righteous, kind, and brave, yet reckless and quirky, with deep empathy. He currently lives with Professor Kukui. Partner Pokémon: Pikachu, Rowlet, Torracat, Lycanroc

A 10-year-old girl and a Water-type Trainer who loves fishing, swimming, and the ocean. She attends the Pokémon School. She is generally gentle and quiet, but contrary to her appearance, she is a woman of action and becomes lively in her areas of expertise. She has excellent athletic reflexes. She is best friends with Mallow. She has twin younger sisters. Partner Pokémon: Popplio, Brionne, Primarina, Eevee

A 10-year-old girl and a Grass-type Trainer. She has a lively personality and acts as the mood maker; she is easygoing but can be a bit clumsy. Her family runs a restaurant, and she is a talented cook. She is best friends with Lana. Partner Pokémon: Steenee, Tsareena

A 10-year-old girl and the shy daughter of a wealthy family. She has extensive knowledge of Pokémon but is hesitant to touch any Pokémon other than her partner. She uses polite honorifics for everyone. An Ice-type Trainer. Partner Pokémon: Alolan Vulpix (Name: Snowy)

A 10-year-old boy who is confident and energetic. He attends the Pokémon School. He lacks athletic ability but possesses great insight. He is very social. An Electric and Bug-type Trainer who is skilled with machinery. Partner Pokémon: Togedemaru, Vikavolt

A 10-year-old boy with a hot-blooded personality. He attends the Pokémon School. He is serious and passionate about everything, yet quirky like Ash. A Fire-type Trainer. Ash's battle rival. Partner Pokémon: Turtonator, Alolan Marowak

A man who is both a school teacher and a researcher. He is in a relationship with Professor Burnet. He lives with Ash. Ranked number one in the Alola region. Partner Pokémon: Incineroar

A woman and Professor Kukui's partner. One of the researchers working under Lusamine. She is cool and confident. Partner Pokémon: Munchlax

A woman and Lillie's mother. She has a playful and childlike personality. She is overprotective of her children but is often too busy with work to look after them. Partner Pokémon: Clefable

A Pokédex that provides information on Pokémon. It bickers with Ash but is very energetic. It always ends its sentences with "-roto."