1girl, ass, bare_shoulders, beach, bikini, black_bikini, breasts, butt_crack, byleth_(female)_(fire_emblem), byleth_(female)_(summer)_(fire_emblem), byleth_(fire_emblem), capelet, enlightened_byleth_(female), fire_emblem, fire_emblem:_three_houses, fire_emblem_heroes, flower, green_eyes, green_hair, hair_flower, hair_ornament, halterneck, large_breasts, looking_at_viewer, looking_back, medium_hair, ocean, official_alternate_costume, outdoors, sandals, sideboob, solo, swimsuit, tassel, wet, zet_(twt_zet)