User blog comment:Imouto-tan/Sherria Amicus/@comment-4867780-20160115050347/@comment-26362471-20160115141458

Xuan Nu is Sherria's daughter by legit pregnancy back when she was still in ancient China. Victoria Amicus and Dai-sensei were both created to store her human side, but Sherria still treats them as daughters. Victoria is her but not her, it's hard to really explain but Victoria is how Sherria was in 19th century and Dai-sensei is like how she was when she first went to Destiny City and when she first met Chou-Chou.

Well I wouldn't call them "expendable tools" to her, because she does take of them in other ways being that they are her. Sherria may go about it all wrong, but she does love them and will intervene to save them if needed or to watch a class.