The only word to describe the outfit is 'mesmerizing.' The intense, almost fierce look on the woman's face, along with the seductive draw of the outfit suggest a woman of Power: beware, men! Are your intentions pure? Are you an impeccable warrior?
The fan is wielded as a signal; a warning; a implement of protection; a weapon (?)
Cherry blossoms represent the Japanese concept of Mono no aware, literally "the pathos of things", also translated as "an empathy toward things", or "a sensitivity to ephemera". This term is used to describe the awareness of impermanence, or the transience of things, and a gentle sadness (or wistfulness) at their passing. [Wikipedia]
This concept helps me begin to understand the expression on the woman's face.