Liza is a Charizard Trainer in the Charicific Valley who looks after the Charizard that live there. When she met him, Liza knew Ash had a Charizard so she decided to ask him, Brock and Misty if they would like to see the Charicific Valley. She also looks after Ash's Charizard when he left it there for training. She appeared for three episodes after this to help Clair, her childhood friend, stop a Dragonite from destroying the Dragon's Den. She first appeared in the episode "Charizard's Burning Ambitions." Her English voice actress is Lisa Ortiz.
Charla is a Charizard that lives in Charicific Valley and belongs to Liza. Charla belongs to Liza, who maintains the Charicific Valley. Ash, Misty, and Brock got the chance to meet Charla while wandering through the Valley. Charla is Liza's only Pokémon, and her greatest partner, seeing as it travels with her to places outside the valley. She may also have a crush on Ash's Charizard.