ポリーナ・ミーロヴナ・フォン・シュヴァルツァハーゼ

Affiliation: The navigator character of "CrownHearts"
Class: Dark Princess
Hobbies: Taking walks, basking in the sun

The mysterious girl who led Koharu into the world of CrownHearts. Despite being the navigator character for the game, she stays in the real world with Koharu and the others. Strongly believes to have lost her memories at least partially and that they have scattered around just like pieces of trash. However, everything she sees in the real world is fresh and new to her, especially the food: Polina is shown to have a tremendous appetite.