Jem Finch, from Harper Lee's To Kill a Mockingbird, is Scout's older brother, a character who undergoes significant coming-of-age as he grapples with the injustice and prejudice of his world, moving from childhood innocence to a more mature understanding of morality, courage, and empathy, inspired by his father, Atticus. His journey is marked by a loss of innocence, particularly after the Tom Robinson trial, but he ultimately learns that true bravery and justice are found in compassion.