crystal maiden (series), artist request, game cg, highres, official art, variant set, 1girl, bare legs, bare shoulders, black shoes, blue eyes, blue hair, bow, bra, breasts, cleavage, covered erect nipples, engine, fingerless gloves, forehead, full body, gloves, hand on own hip, holding, holding weapon, katherine (crystal maidens), navel, navel piercing, over shoulder, panties, piercing, shoes, solo, star (symbol), star print, transparent background, underwear, water, weapon, weapon over shoulder, white bow, white bra, white panties, wire