Un - Chosen - The Hunger Within. Un - Chosen, #1

The story follows Elara, a young woman who survives the apocalypse only to discover she's become one of the Un-Chosen, a new kind of being with superhuman strength and speed. She finds a sanctuary with a group led by Julian, who teaches her to control her new abilities. Their fragile peace is shattered by two conflicts: a moral dilemma over whether to help human survivors and the arrival of a ruthless human military leader, General Thorne.
Elara and Julian are forced to confront their differing philosophies, with Julian believing they must remain hidden and Elara advocating for them to become protectors. The conflict spirals into a betrayal, as Julian confesses he gave up their location to Thorne in a desperate act of self-sacrifice to save the group. The Un-Chosen are scattered, and Elara forms an unlikely alliance with Marcus, a human who once hunted her but has also been wronged by Thorne.
This series culminates in an epic final battle where Elara's small, ragtag group takes on Thorne's army. Though they win, the victory comes at a terrible cost, leaving their numbers few. In the final confrontation, Elara faces a choice to give in to her hunger and kill Thorne but instead holds onto her humanity and spares him. She emerges as a true leader, a symbol of hope and dread, ready to face the world as a protector and leader of a new era.