Woman in Black Swimsuit Standing by Pool Railing

A woman with long blue hair wearing a black one-piece swimsuit, standing by a railing in what appears to be an indoor swimming pool area. The woman's hair is styled in a way that suggests she may be cosplaying as a character from an anime or manga series. She has a blue necklace around her neck and is holding onto the yellow railing with both hands. In the background, there are several people swimming in the pool and others standing around the edges of the pool area. The overall atmosphere of the image suggests that it was taken at some kind of public event or gathering, possibly a cosplay convention or anime fan meeting.