Neptune

The CPU of Planeptune, and the self-aware titular protagonist. She transforms into Purple Heart. Neptune is the human form of the CPU Purple Heart. She is often considered to be energetic and dorky. Her favorite food is custard pudding and she loves playing video games. Eggplants are her most hated food, stating that they are not "people food". While she enjoys playing all games, she especially loves Retro video games. Purple Heart is the goddess form of Neptune. She is considered to be cool, collected, just, and overall much more mature in comparison to her human form. While the personality and appearance change is major between the two forms, she still retains some aspects of her human form albeit to a lesser extent.