Mawaru penguin Drum

Mawaru-Penguindrum (輪るピングドラム Mawaru Pingudoramu?) is a 2011 Japanese anime series.
A terminally ill girl named Himari Takakura is miraculously saved from death by a strange spirit who resides in a penguin-shaped hat. However, in exchange for extending her life, the spirit tasks Himari's brothers, Kanba and Shouma, to seek out an item known as the Penguin Drum with assistance from a trio of strange penguins.

My Character is Himari takakura: She is revived by a penguin hat bought at the aquarium's souvenir shop. When she wears the penguin hat, her appearance and personality changes to that of the Princess of the Crystal (プリンセス·オブ·ザ·クリスタル Purinsesu Obu Za Kurisutaru?), a dominatrix, donning a skintight costume and ordering the brothers to obtain the Penguindrum in order to extend her life. When she was a child, she was part of the aspiring idol group "Triple H" with her friends Hibari and Hikari, but stopped speaking to them when she left school. She states that she is glad for their success.
This is my princess of crystal version