Chihaya Kisaragi, Vivid Bikini, Idolmaster

The image features Chihaya Kisaragi from the Japanese media franchise The Idolmaster, dressed in her Vivid Bikini costume. She has long blue hair with a yellow flower clip and wears a blue bikini top with ruffled layers across the chest and matching blue bottoms. Her arms are crossed, covering her breasts while posing for the camera. In the background, there is an outdoor setting, possibly near a pool or at a beach resort. The overall impression of the image is that Chihaya Kisaragi is modeling in a swimsuit for promotional purposes.