You were old when I was born. You regret that I was late born, I regret that you were early born. I was not when you were born, You were old when I was born. I wished to have been born together, We could enjoy our time together. You were not when I was born, I was old when you were born. I was so far away from you, You were so distant from me. You were not when I was born, I was old when you were born. I'd become a flower-seeking butterfly,And sleep on the fragrant grass every night.
— Xiao Ruse to Zhou Weiqing
Ru Se was very adamant about being the "Prime Minister" of the country, and she was for "equality" (what men can do, woman can do).
Ru Se even insisted that if she needed a child, she'll just find somebody to father it, and kick the man out after she successfully has a child.
Company Leader of 5th Regiment, 3rd Battalion, 3rd Company. She is the daughter of Finance Minister, Marquis Xiao Yunchen. A childhood friend of the MC. She failed to awaken her Power Jewels so she disguised herself as a man and entered the army. 18 years old (Chapter 15).
Xiao Se is a girl in disguise and is a childhood playmate of the MC though 6 years older. They have the competition and MC is kicking butt using hit and run and other techniques. In the end he uses some subterfuge that others don't see and shoots the other battalion leader. Some stuff happens and he challenges Xiao to competition and if he loses he will leave army. He wins and reveals who he/she is then is overcome with attack from black pearl. Bing'Er is worried because they don't come out for long time and rushes in to find them he grabs her/pushes her down like he is going to attack her again then calms down. Xiao and Bing'Er get less hostile.