1girl, arknights, breasts, cleavage, crow_yayu, day, detached_sleeves, flower, hair_spread_out, horns, large_breasts, long_hair, long_sleeves, lying, official_alternate_costume, on_back, outdoors, parted_lips, planted, planted_sword, purple_eyes, red_hair, shallow_water, smile, solo, sunlight, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), sword, upper_body, very_long_hair, water, weapon, yellow_flower