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?
Gonna echo the other folks here - heroism does not require perfection. Everyone you can think of as a hero has a flaw (or several), big or small.
The upside to this is that heroism is accessible to almost everyone. Any opportunity you have to do the right, but difficult (and tbh sometimes not all that difficult, perhaps just uncomfortable or risky), thing is the chance to be a hero to someone in some respect. The downside is that people you may admire as heroes, when you meet them as just people, can sometimes be disappointing.
The only flawless heroes are superheros (and even then, few are written about like that these days). Think about that prefix- how are the terms superhero and supernatural alike?