Which pokemon character would you like to see a backstory of?

I think there are many characters in the pokemon world that are very interesting, yet for a lot of them we don’t get to know that much, like Elite Four members, Evil leaders and Champions. We can infer some things based on the dialogues we see in the games, but I think there’s potential to develop their stories even further. Which character would you like to know more about? Personally, I would like to see more of Ghetsis, Master Greevil and some elite four members to name a few.