1girl, arknights, armpits, arms_up, bad_pixiv_id, bare_arms, bare_shoulders, bikini, black_bikini, black_ribbon, breasts, closed_mouth, collarbone, from_above, gradient_background, hair_between_eyes, hands_in_hair, horns, large_breasts, long_hair, looking_at_viewer, looking_up, mildt, pink_background, purple_eyes, red_hair, ribbon, side-tie_bikini_bottom, solo, surtr_(arknights), swimsuit, upper_body, v-shaped_eyebrows, very_long_hair