I always knew that Kacchan is veeeeery popular but he seems to be winning by a landslide. I just found a reeeeally awesome video on it. Kudos to the maker for the sequences and the perrrfect song for it
This angry hedgehog deserves all the love in the world !!!
The video covers the first 3 popularity polls probably. Kacchan won the latest poll (5th) in December 2019 by another landslide
EDIT: the video showed the 2nd, 3rd, and 4th polls. Here are all the polls: https://bokunoheroacademia.fandom.com/wiki/Popularity_Polls#First%20(Japan)