Alex Davis was a wide receiver on the Paradise High School Football team. He was a year younger than Mark James and was part of his close circle.
Alex is thought to have dated Emily Knapp at some point, implied when he corners Sam Goode to confront him about getting close to her at Mark James' house party. (I Am Number Four)
With his parent's out of town for one weekend, Alex manages to score a keg of beer and invites his friends, including Mark who has become somewhat of a recluse since the battle at the school, to his house to drink it. Mark attends for a short while before realising he has the keys to his father's office and he leaves to investigate. (Return to Paradise)