Derceyes is an owner of Pokémon, specifically in dragon-types. Though not all of her Pokémon are technically Dragons, all have dragon features. She lives on a large mountain in the Kanto region. She is one of the foremost researchers into the Dragon-type and near-Dragon-type Pokémon. She has given her findings to distinguished professors and researchers, such as Professor Oak and Lance. Additionally, Derceyes is a former winner of the Kanto Indigo League. She is widely respected by many Pokémon enthusiasts because of this.