A Station Eight Fan Web Site
How long does a hero have to be on the team that they are no longer a freshman on the team?
The "Freshman, Sophomore, Junior, Senior" thing is not an official IN-SHOW notion. It was a convenient way for us OUTSIDE the show to talk about these distinctions. But if you want to push the idea, then I guess that after a year on the Team, you move from being a Freshman to a Sophomore (basically).