"Autobiography" means a biography of oneself, that is, the author is describing their own past and their own life.
When you describe your own life, typically you would write it in the first person ("I") and this is also true for Barrio Boy.
Odysseus, the hero from Homer’s epic poem The Odyssey, does not kill the brutish cyclops, Polyphemus, because Odysseus and his men would be trapped in the cave.
“Then he rolled a huge stone to the mouth of the cave—so huge that two and twenty strong four-wheeled wagons would not be enough to draw it from its place against the doorway.”
<em>-ur local skatergirl, Rin:)</em>