Alex Aruda is one of the smartest people in Greg's school. He has glasses and a big afro. According to Greg, he is smart because his last name begins with A, and the teachers call on the first alphabetical names the most, so they end up being the smartest. Greg usually copies off his math test when he's finished (because he puts his test on his side and doesn't know Greg can see it). In The Last Straw, Mrs. Craig's dictionary was missing and Alex was the one who was studying the book, which was accurate to how he was portrayed, nerdy and studious.