Legends say when the skies grow dark and scourge starves the land, a star will fall in order to save humanity. Only when the star is sacrificed at the end of their journey will light return. It's a cycle-one humanity refuses to break because stars are plentiful and their sacrifices easier than learning the true nature of the scourge.
When Sol finally falls, it's not because of humanity. It's because he's had enough of watching his brethren be sacrificed. He has one goal: end humanity and end the cycle.
Unfortunately, he has to pretend he cares before humans get wise. It doesn't matter how soft the princess who catches him is-Celena will be dead by the time his journey ends. Nor how kind his assigned companions are-the outgoing Mira with her ballads, the brave Nebora with her axe, and the hero Loren with his soft voice and friendly smile. For centuries, humanity has lied and their kindness is a ruse to bring about Sol's own destruction at the end of his tale. He will not be fooled.
No one cares about the cries of the stars they've destroyed over and over again and Sol will make sure this time, humanity is the one sacrificed.
At least, that's the plan until his traitorous heart begins to care for the humans he sought to eradicate.