Cynthia is the Champion of the Sinnoh Elite four, as well as the first female league champion in the Pokémon video game series.
Her Pokémon include Spiritomb, Garchomp, Lucario, Gastrodon, Milotic, and Roserade. It is notable that Cynthia's only non-female Pokemon is her Lucario. She helps the player with several odd predicaments throughout the game, such as alleviating the headaches of a group of Psyduck. Her grandmother is the elder of Celestic Town, and she has a strong interest in Pokemon mythology. She first meets the player to give him or her the Hidden Machine for Cut. She says that when she was younger she traveled around with a Pokedex for Professor Rowan.''

also watch this pic of her --- [link]