In The Club, Celestine first appeared when she saw Ava celebrating her victory over her school's Pokémon Club members and teased her if she would get that same result over professional players in the world championship.

In Regionals, Celestine was reunited with her rival again at the regional championship, after teasing Ava, Celestine had a match against Ava's father and despite Ava's father being an experienced player, he was defeated in a single round by Celestine.

During the remainder of the competition, Celestine was beating her opponents one by one. and you meet her and talk about you're pokemons and see whos is better