The word is ambiguous as it means something different to everyone
The look however stays relatively the same as people often picture these superhuman beings with terrible fashion sense as they wear their tight pants , and bright colors. While they get to wield super cool fierce weapons with unique names.
Their characteristics of strength, leadership, bravery, persistence and and a bright smile that says "I am here " bringing comfort to all.
All my life i always thought being a hero was about gaining glory for oneself. As a young man i strived to become known as the best hero across tribes.
It was not until I became a King of my geatish nation did i know the true meaning of being a hero. A dragon came to reveal this answer by putting me up to the greatest test of my life, i changed my persona going by the name Captain Beowulf to perform the sole purpose of being a hero, saving people, saving my people.