Who is the most popular axis powers hetalia character?

Answer 1

Of course this could be largely a matter of opinion, but England does seem to be a widely loved character in Hetalia. His name brings up more images on fansites and has the most fanfictions. He also has the largest number of enthusiastically supported pairings.

Answer 2

Going by sales, probably England. His character CD sold the most copies, followed by Japan. This is matched in fan community polls, with England and Japan being listed most.