From Bulbapedia, the community-driven Pokémon encyclopedia.
Anna is the receptionist for Pokétopia in Pokémon Battle Revolution. She has blond hair, white skin, and light green eyes. Her suit is blue with an orange scarf. A Pikachu doll sits on her desk.
She gives out Poké Coupons and new custom passes after you beat a Colosseum. She also explains the menus to the player when they first access them.
She apparently watches all the player's battles.