Roxas, Kingdom Hearts 2

The person in the image is dressed in a costume, likely for a cosplay event or convention. The costume consists of a white shirt with black trim and a pair of gray pants with a distinctive design on the side. The person's hair is styled in a spiky fashion, which is consistent with the character they are portraying. They are holding a large sword, which appears to be made of metal or plastic. The background of the image is out of focus, but it appears to be an indoor setting, possibly a convention center or hotel ballroom. Overall, the image suggests that the person is attending a cosplay event or convention and is dressed as their favorite character from the Kingdom Hearts series.