Katara and Zuko

Warning!!! This post contains spoilers for both my Fanfic and the real episodes!!

Katara is a Water Bender. She is very motherly and always finds hope. Everyone expects her to be with Aang, the Avatar, but it turns out that may not be the case. When Zuko joined the group, everyone came to trust him except Katara. She had even went so far as to threaten his life. She was angry with him up until he helped her find the man who killed her mother. She realized Zuko was actually good and met up with him later that night. The two continued to secretly meet but Katara never confirmed to him if it was anything long term or even serious.
On the day of the invasion, Zuko asked Katara to help defeat Azula. Katara agreed and Zuko ended up getting shot by lightening trying to save Katara. Katara defeated Azula by chaining her up. Katara healed Zuko and realized that she loved him. She told him of her feelings and that she wanted to be together. Zuko told Katara he wanted to marry her and she agreed happily.
That's as far as the story has gotten.
The same goes for Zuko as I explained both sides.
He is a fire bender, banished prince from the fire nation.