@Koi I'd say it's just that she's super clingy to her older brother and (Me personally as someone with many siblings) most of the time siblings usually just straight up attack eachother (Like he tian and little Mo's relationship). Not saying some siblings relationships can't be close like this it's just a bit unusual, and also she's quite nosey, crying everytime her brother dosen't do something she asks. This is just my assumption and how i feel about his sister but she isn't a bad character and is quite refreshing consider a lot of other stories make the sisters kinda... uh- mature for their age.
