1girl, armpits, arms behind head, azur lane, black leotard, clothing cutout, covered navel, crescent moon, cross, curled horns, demon horns, demon tail, elbow gloves, gloves, gneisenau (azur lane), gneisenau (nightmarish succubus) (azur lane), grey hair, halloween costume, highleg, highleg leotard, horns, leotard, long hair, moon, official alternate costume, oregano (olgn eao), solo, tail, underboob cutout