>>108416874She gets very little screentime so not a lot of opportunity to show or develop her character.
Really her role in the show is to help Zuko realise there's more to life than HONOUR and THE AVATAR.
Zuko goes on a date with her, and whilst he starts out as his usual stick-in-the-mud self by the end of it he risks blowing his cover just to do something nice for her.
It's a humanising moment for Zuko. She's not a bad character, just a temporary one.