The Rise of Kyoshi: Twin Tides

Kotina, A Southern Water tribe member born and raised, however, growing up in the Southern Water tribe was hell to her. Her father wanted a boy that he could train as a warrior and as a Waterbender instead Kotina is a girl and a non-bender, Her father could've tried again but his wife, unfortunately, passed away when Kotina was only 5 due to a terrible ice storm after that, Her Father just disowned her.
so for 2 years, she has been surviving off of scraps and leftovers from people of the Southern water tribe who took pity on her but didn't take her in due to taking care of their own family...
She was alone, cold, and often left hungry, thinking she wouldn't last another year until she met Hei-Ran, a respectable Military Commander of the fire nation and Headmistress of the Royal Fire Academy for girls from that moment on, She became Hei-Ran's second daughter, sister to Rangi, friend of Kyoshi and Avatar Kuruk's successor, Yun.
She was happy with her new life and family until everything fell apart. The truth about Yun not being the actual avatar, Kyoshi being the true Avatar, Her, Rangi, and Hei-Ran bonds were breaking into nothing but coal crumbs.
she didn't know what to do....
What can this Non-bender do to save her bond with her family and friends?