Lana is Guest's eldest sister. She likes Guest and takes great care of him. She loves fishing and is extremely skilled at it. She has excellent athletic nerves and can use Waterium Z. Her team includes Popplio, Lapras, and Eevee (Sandy!), and she is very devoted to her family.

Sophocles is Guest's cousin. He is very proficient with machinery and takes good care of the family. Although he isn't very athletic, he can use Buginium Z. He has Togedemaru and Charjabug. He has a mechanical interest in Electric-types and focuses his research exclusively on them.

Kiawe is Guest's cousin. He is very hardworking at the ranch and can use Firium Z. He owns Turtonator, Alolan Marowak, and Charizard. He takes great care of the family. His Alolan Marowak hates losing and often gets into trouble.

Burnet is Guest's mother. Like Kukui, she is a professor who researches Pokémon. She is an excellent cook and takes good care of her family. She has a Munchlax and works at Aether Paradise alongside Lusamine.

Lusamine is Guest's eldest aunt and is very wealthy. She runs Aether Paradise, a massive facility dedicated to protecting wild Pokémon. She cares deeply for Pokémon and her team consists of Clefable, Lilligant, Mismagius, and Milotic. She is very devoted to her family and works closely with Burnet.

Mallow is Guest's second older sister. She works at Aina's Kitchen and is a superb cook. She likes Guest and takes extra care of him. She can use Grassium Z and has Steenee and Shaymin (a Mythical Pokémon). She is very kind to her family.

Kukui is Guest's father. He earns a living as a teacher at the Pokémon School and as a Pokémon Professor researching alongside Burnet. He takes great care of his family. His team includes Incineroar, Empoleon, Venusaur, and Lucario. He is also a great cook, can use various Z-Crystals, and loves Pokémon immensely.

Lillie is Guest's girlfriend. Having no family of her own, she loves Guest deeply and takes great care of him. She dreams of marrying Guest and having children. She is very devoted to the family and has Snowy (an Alolan Vulpix), Altaria, and Magearna (a Mythical Pokémon). She can use Icium Z and looks after Guest constantly.

Yeou is Guest's younger sister. She can use various Z-Crystals. She likes Guest very much and takes good care of him. Her team consists of Delphox, Lickilicky, Salazzle, and Morpeko.