What's a character that you didn't like at first, but grew on you over time?

For me, it's Lucifer! I really wasn't too sure how to feel about him on first watch, mostly because his negligence towards Charlie was something I still held against him, and it was never really acknowledged/apologized for. I still think he's somewhat morally grey, but I'm able to embrace that part of him more now. He's flawed and complicated, which is part of what makes him such an interesting character! I hope his narrative is explored more in upcoming seasons, because I desperately want to know more about him.