Aster Yoruko/Sailor Hime Reina is a character by pixiv user 三一马金花G.
There's two more Sailor Himes, but since there's no chapters focusing on them, I won't bother.
Description
Sailor Hime: sailorhimereina, magical girl, solo, 1girl, black hair, long hair, white hair, streaked hair, white streaks, single hair streak, yellow eyes, headgear, flower hair ornament, black sailor collar, yellow neck bow, large bow, brooch, white gloves, elbow gloves, leotard, yellow belt, metal belt, back bow, black skirt, pleated skirt, pantyhose, white thighhighs, black shoes, high heel shoes,
Normal + Weak Form: asteryoruka, solo, 1girl, black hair, long hair, yellow eyes, headgear, black sailor collar, yellow bow, small bow, flower brooch, white gloves, elbow gloves, leotard, no skirt, pantyhose, white thighhighs, black shoes, high heel shoes