In Greek stories, the character who transforms into a star upon their death is Hercules (Heracles). After completing his Twelve Labors and facing incredible challenges, Hercules is granted immortality and is placed among the stars by Zeus as a reward for his heroic deeds. This transformation symbolizes the idea of legacy and how extraordinary human efforts can transcend mortality. Hercules' ascent to the heavens offers a powerful narrative about honor, strength, and the pursuit of greatness, inspiring those who hear his story.