This question is for ‘hero’ in all forms: realistic, fiction, superhero, comic book, anime, etc. Let’s say a person is flawed, or is very arrogant, or has a superiority complex, etc., but also does heroic things—like being a firefighter, doctor, wizard, superhero, whatever. Do you think that person is still a hero despite having negative personality traits?
Of course no person is perfect, and in literature a perfect person would be boring.
In my view, anyone who does something selfless that really helps other people or person, because they see the need to help, is a hero. They don’t need to be good in every other way. Just that they use their powers for good.
Villians can be nice, too. With some fatal flaw that causes great harm.