1girl, ahoge, armor, black footwear, black theme, black thighhighs, boots, brown eyes, chiaroscuro, dark, gears, hair between eyes, long hair, looking back, machine, original, polearm, purple hair, refeia, smile, solo, spear, thigh boots, thighhighs, weapon, zettai ryouiki, gloves, fingerless gloves, elbow gloves