Xiao Yue character concept

My OC, Xiao Yue's character concept .Xiao Yue is a half Japanese and half Chinese girl . Although she looked like an ordinary Malaysia secondary school girl who goes to her school, studying like other school kids but her actual identity was yet to be discovered by anyone around her except her guardian, Toshi .Although she looks pale in terms of skin color but that doesnt mean she's physically weak...Actually she got quite an athletic body built and rather strong. She always carry her katana, "violet cloud" when "on duty" .