I love Yona's character. She is a sincere, hardworking, inspiring, a good leader. She is also stubborn and wants to do what she sets out to do. Kusa made a good girl boss type of character which is rare in mainstream Shoujo.
I also love her dynamic with Hak, it's cute and funny, and we fangirls love to fangirl over this relationship.
Yona also teaches us something so important - that people change and forgiveness is important. In the beggining she was so scared of Soo-Won, but now she can look him in the eye and talk to him. She is also able to move past what he did and work together with him. It's really amazing.
Yona had to solve some riddles for herself instead of getting pampered by the gods
Yona did, she solved the biggest internal struggle of accepting Soo-Won as a king and working together with him for Kouka. Gods didn't do that for her.