crystal maiden (series), artist request, game cg, highres, official art, variant set, 1girl, baggy pants, bare shoulders, black shoes, blue eyes, blue hair, breasts, crop top, denim, engine, fingerless gloves, forehead, full body, gloves, hand on own hip, holding, holding weapon, jeans, katherine (crystal maidens), navel, navel piercing, over shoulder, panties, pants, piercing, screw, shoes, solo, star (symbol), star print, transparent background, unbuttoned, underwear, water, weapon, weapon over shoulder, white panties, wire