Lan Fan, Fullmetal Alchemist

A woman dressed in a black and white costume, kneeling on one knee while holding a mask with red and white stripes. The woman's dark hair is styled in bangs, and she wears a black top and pants with a white sash tied around her waist. She also has black boots on her feet. In her right hand, she holds the mask, which features red and white stripes and appears to be made of fabric or paper. The background of the image is out of focus but seems to show people standing in what could be an event venue or convention center. Overall, the image suggests that the woman is cosplaying as a character from a popular anime or manga series, possibly Fullmetal Alchemist.