Different characters ingame Overlay - HOW?

Hello! Im pretty lost at making UI...

Im working on the ingame abilities overlay for my game (Screen Space - Overlay), but depends of what character did you selected, the overlay images would be different, but the structure is the same for everyone. (like a MOBA)

What is the best way to do it?? Should I create a basic overlay and connect it to the character when it is intantiated? Should I add a UI gameobject inside every character as a children? There is maybe some good package?

Thanks already