Drama where one or more characters have a redemption arc?

I want to see a character who you hate in the beginning go through a long series of events that change them slowly, until they eventually switch to being good.

Please mention the name of the character.

Thanks in advance.

• Maids - FL
• Madam - SML
• Moonlight Mystique - SFL 
• The Romance of Hua Rong Season 2 - SML
• Once upon a Dream - ML
• Time Flies and You Are Here - ML
• Skip a Beat - ML
• Summer's Desire - ML
• Iyashi no Otonari-san ni wa Himitsu ga aru - ML
• Squid Game - ML (not good, I'd say, but definitely selfish to selfless over the three seasons)

If You Wish Upon Me starring Ji Chang Wook. It is about him getting released from jail and is trying to hid from the gang he was affiliated with. So he ends up doing community service at a hospice. At the hospice they try to grant their patient's last wish. I loved his character growth in the show. And his acting is amazing in the drama.