Leena was Daisy's sister, who worked as one of Oak's Aides to try and learn more about Legendary Pokémon. She tried controlling some of Daisy's Pokémon by turning them into "Black Pokémon" which she claimed were like Shadow Pokémon, but could never be purified. However, it turns out they were being controlled by an external device. She was killed when Josie punched her in the face. According to Daisy, before Leena became evil, she was like Jane personality-wise.