Walter "Egg" Diaz is Madison's best guy friend. He got his nickname when an egg was thrown at his face when he was younger. Egg is only called Walter by his mom and Fiona. It becomes obvious that he and Fiona Waters have a crush on one another and are supposedly 'going out' later in the series. Egg is described as annoying, loud and loves to make fun of his friends and pull jokes. He also the groups' computer whiz along with Drew Maxwell. Egg, along with most of the guys in the group, plays hockey and his mother teaches Spanish at the group's school.