This character wears a bikini.
The bikini is typically a women's swimsuit, either a one-piece or a two-piece. For the two-piece, one part of the attire is covering the breasts; the other the groin and, optionally, part or all of the buttocks, leaving an uncovered area between the two.
The bikini is often worn in hot weather, while swimming or sunning. A bikini is often worn as an undergarment to the wetsuit for waterskiing, scuba diving, surfing, and wakeboarding.
The shapes of both parts of a bikini resemble women's underwear, and the lower part can range from revealing thong or g-string to briefs and modest square-cut shorts.