Everyone's first impression of Xu Xu was usually that she did not pay too much attention to how she dressed. She wore a suit and a shirt to work, casual sportswear out of work, and never seemed to put on makeup. When paired with the cold expression constantly on her face, she seemed even more plain and boring.
In reality, Xu Xu was very particular about the way she dressed. However, her focus was always on whether or not the style was appropriate for her.
For instance, she would buy delicate mature pajamas which were slightly sexy and rather feminine which she wore at night. (A.K.A. when she was alone.)
All her sportswear was carefully selected to make sure the fabrics were light, breathable, waterproof, and quick-drying. Her sportswear were all products which had been scientifically proven to help performance whereby the only downside was the low variety of style. This is why her sportswear did not look too fancy,
