Hau is a boy with dark skin, dark green hair tied into a short ponytail with an orange band and gray eyes. He wears a black shirt, yellow board shorts with orange and white flowers on them and orange shoes. He carries an orange backpack with him.
In the games
Hau is a boy who lives in Iki Town of Melemele Island. After the player character (Sun or Moon) arrives in Alola, Hau quickly befriends the player character and they become rivals. He battles the player character several times across the Alola region.
In the anime
Hau makes his debut in "No Stone Unturned!", where he is seen training with his Dartrix before the latter bound Ash, Pikachu and Rotom to a tree, thinking that they are enemies. However, Hau realized that Ash has battled Hala, his grandfather, in a grand trial.
- Hau is the third rival to pick the Pokémon which has the type disadvantage, with the first being Bianca and the second being Shauna.
- Hau is the first rival to have dark-skin.