Jang Hye Sung, as played by Lee Bo Young, in I Hear Your Voice.
It doesn’t get better than Hye Sung, honestly. She is snarky and cynical and smart. She is hugely confident but willing to grow. She is passionate and she makes mistakes, but she really does try to do the right thing. Her imperfections make her the perfect heroine—an attainable object of aspiration. And did I mention that she’s hilarious?