Haruka Armitage

ハルカ・アーミテージ, Topaz of the Jewel Isles
Haruka is a headstrong and impulsive Meister Otome known as the Topaz of the Jewel Isles. Early in the story Haruka is a role model for Arika Yumemiya and tells her that an Otome needs Strength beauty and guts before hurtling a spaceship away bare handed. She was classmates with Shizuru and there are hints in the series of a rivalry between the two. Her element is the same ball and chain mace weapon of her MyHiME manga counterpart and her Element attack is called Dynamite Crusher. Her master is the President of Aries and her best friend Yukino Chrysant. Source: Wikipedia