She is the little princess of the Retard family, the world's foremost assassin clan. Her parents and older brother don't want her involved in the darkness of their world, so they won't let her train on Assassin Island. Because her mother is of mixed blood, descended from Elizabeth, she was born a princess of the British royal family without the surname. A genius, she had already reached a doctoral level of knowledge before she was five, thanks to her family's tutelage. Before turning six, she had mastered every kind of self-defense, from taekwondo and karate to Jeet Kune Do. Before turning seven, she had reached the highest level in piano, violin, and every other instrument. Until she was seven, she was the darling of the family. Then her younger sister, Meng Wu R. Naobaisheng, was born, and everything stopped revolving around her. But kind as she was, she protected her sister at every turn. Then, one day, she overheard her sister's opinion of her, and cut ties with her forever. Her parents and brother misunderstood her because of it. Proud and unyielding, she simply said,
I'm a yuri fan, remember to let the female lead and her sister end up together!
I'm guessing Huan Yu is Huan Yue. Because their names sound similar when typed.