Maya is a recurring character in the Pokémon anime who serves as a Sea Priestess of the Whirl Islands. She's the caretaker of the Whirl Cup, a competition she oversees using the magical power of the Great Sea Spirit Sapphire—a responsibility passed down through generations of Water-type Trainers before her. When she invokes the Sea Spirit Union, she can apparently communicate directly with Water-type Pokémon.
She appeared in the episodes "Dueling Heroes" and "The Perfect Match!" watching over the Whirl Cup. Maya comes across as pretty confident; when Officer Jenny warned her that someone might steal the Sea Spirit, Maya just smiled it off and told her not to worry about it.
Content compiled by AnimeList.moe from publicly available sources.