The Idolmaster (Series, Movie, and Art):Chihaya Kisaragi

Chihaya is a naturally gifted singer and has the greatest passion for music and singing.  She considers herself to be a 'vocalist' more than an idol, and sometimes shows less than eagerness for the non singing part of being an idol.  She has a tragedy in her past that leads her to distance herself from her fellow idols.

If you want to see Chihaya oil wrestle Yayoi: Chihaya vs Yayoi Part 1

                                                                           Chihaya Vs Yayoi Part 2