Jarrett--Back home everyone called him Gerrald. On Kimyra, no one can say that name. Even when he tries to pronounce his own name, it comes out Jarrett.

From the book:

I was a skinny kid, with knobby knees, an Adam’s apple that looked like I’d swallowed a tennis ball, a skeleton that poked out all over the place testing the limits of my skin—which was the color of a dead fish—ears that were catchers’ mitts, bristly hair the shade of a rusty can, and a mob of freckles that rivaled the Milky Way. I was also little. All freshmen are little, compared with the rest of the school, but I had the misfortune of being the smallest of the small. No one else came within two inches of my miserable record, not even any of the girls. Four feet, nine inches of nerd, which on that day was a lot more nerd than I wanted to be.