Heracles had a lot of determination when he did his twelve labors. To do these labors, he had to have the strength and determination to get his immortality. This shows Heracles following the boar until it's tired, showing his determination.
Maui had to have a lot of strength to defeat the sun. He used his strength to hold back the sun while the sun was burning him just to save other peoples day cycle.
Chi Li was very brave when she killed the dragon. Chi Li volunteered to be eaten by the dragon while in reality she was going to kill it. She was brave because she knew that many girls were killed by the dragon, yet she went to slay it anyways