Her name is Uchiha Sako.
It is considered a member of the Uchiha clan, to be more precise - it is the female body of the second master! QAQ
This cliff is not self-defeating and being loved to comfort me, you bastard!
The real introduction is this:
Erye Zuozi, I've come here with Kuai, let me help you to win the country _(:з∠)_[Hey, something seems to be wrong.
Zuo Zi: Erye's ball hugs his thigh! I'm yours!
Second Young Master: ... Your sister.