hjm matsukasa, surtr (arknights), surtr (colorful wonderland) (arknights), arknights, commentary request, 1girl, ass, bare shoulders, bikini, black bikini, blue sky, breasts, cleavage, closed mouth, cowboy shot, criss-cross halter, demon horns, detached sleeves, expressionless, hair ornament, halterneck, hand up, horns, large breasts, letterboxed, long hair, long sleeves, looking at viewer, lying, official alternate costume, on stomach, outdoors, purple eyes, red hair, side-tie bikini bottom, sky, solo, star (symbol), star hair ornament, swimsuit, swimsuit cover-up, thong bikini