Ed is the leader of three hooded characters who torment and follow Alex home after calling him at a phone booth. Ed is much larger than Alex, showing his dominance. Tom and Ben are Ed's accomplices who help intimidate Alex.
For the film, the group cast themselves in the roles. The smallest member, Alex, was cast as the victim to emphasize his vulnerability. Ed, the largest, was cast as the leader to show power over Alex. Tom and Ben filled out the remaining hooded roles to complete the intimidating trio and demonstrate dominance over Alex.