My Hero Academia has an amazing cast of characters, but not all of them get the attention they deserve. Unfortunately, there are a ton of underrated My Hero Academia characters whose true potential is never explored. Sometimes, they have amazing quirks with powers that could be expanded upon. Other times, they could have a much more integral role in the story. Maybe they're just really interesting and we want to know more about them.
It feels harsh to call these characters examples of wasted potential - after all, Horikoshi can't possibly develop every character equally, and the series isn't finished yet. But these are some of the characters who have the capacity to be much more than they are. Maybe, as the series continues, they'll develop further.