Love, with the Heart of a Dragon

Trinity never asked to be chosen. In truth, she just wanted to love someone, who would love her right back, even though she was sick all the time. She never asked to be a hero; but when a strange boy shows up at her door and declares she's going to save the world, she has no choice but to get up, and try to save the lives of her fellow man. On the way, she learns countless secrets about the world, and even discovers the shocking secret that her companion has.