It's a lot more complicated than what I just laid out as well. I don't know what the Grant from your reality is like or what his family is like but my Grant, his family were abusive and cruel, they were going to have him tried as an adult when he was just fifteen because he'd set fire to his family home with his older brother inside. Garrett broke him out of juvie and offered him the chance to make something of himself but he lied to him from the start, he did make Grant stronger but he manipulated him and convinced him to help him in his own personal mission.