1girl, :p, arknights, bangs, bare shoulders, bikini, black bikini, black ribbon, blue sky, bracelet, breasts, cleavage, criss-cross halter, day, detached sleeves, hair intakes, hair ornament, hair rings, halterneck, holding, horns, jewelry, large breasts, leaning forward, long hair, long sleeves, looking at viewer, navel, official alternate costume, outdoors, purple eyes, red hair, ribbon, side-tie bikini bottom, sky, solo, star (symbol), star hair ornament, surtr (arknights), surtr (colorful wonderland) (arknights), swimsuit, swimsuit cover-up, thigh strap, tongue, tongue out, very long hair, wading pool, water, yuki (nanao yuki)