1girl, arknights, bad_pixiv_id, bare_shoulders, bikini, breasts, cleavage, demon_horns, detached_sleeves, food, hair_between_eyes, hammock, holding, holding_food, holding_ice_cream, horns, ice_cream, large_breasts, long_hair, long_sleeves, looking_at_viewer, navel, official_alternate_costume, purple_eyes, red_hair, sabou_san-shitsu_kokoro, sitting, solo, stomach, surtr_(arknights), surtr_(colorful_wonderland)_(arknights), swimsuit, thigh_strap, thighs, tree, very_long_hair