1girl, alternate_costume, arm_up, armpits, bikini, blue_sky, blush, breasts, cloud, collarbone, command_spell, day, fate/grand_order, fate_(series), fujimaru_ritsuka_(female), fujimaru_ritsuka_(female)_(brilliant_summer), hair_between_eyes, hair_ornament, hair_scrunchie, holding, holding_innertube, innertube, looking_at_viewer, medium_breasts, navel, ocean, official_alternate_costume, one_eye_closed, open_mouth, orange_bikini, orange_hair, outdoors, pttyr, scrunchie, short_hair, side_ponytail, sky, smile, solo, stomach, striped, striped_bikini, striped_innertube, sunlight, swimsuit, wading, water, wet, yellow_eyes, yellow_scrunchie