Biggs spends most of his youth bodybuilding so he can join a hero team.
In searching for an addition to their team, the Five-Man Band search for someone strong, realizing that physical strength is where the team is most lacking.
Defied: Biggs's first day on the job ends when The Dragon injuries him so badly he's paralyzed for life.
Discussed: "You know how every team has a guy on it that looks like a bodybuilder? Why can't we get one of those guys?"
Conversed: "You can't miss him. He's the giant."
Biggs's physical strength and durability hides the fact that he is getting hurt by the enemy. It takes its toll on him and then, just when they need him most, he dies.
Biggs' strength is useful to the team in battle, but when he's not crunching villains he faces other aspects of his job: his teammates' opinion of him is based on his ability to hurt people, some people fear him for his strength, and he can't find clothes that fit his large frame for anything less than a mint.
Biggs learns that the answer isn't to always try to be a One-Man Army and that receiving medical attention or asking for help from others isn't a sign of weakness. With The Power of Friendship on his side, his power is unparalleled. Also, Chica makes him extra big shirts in her downtime.
The Tank shows that "the biggest and strongest" can do more than simple fighting. Instead of being the guy who "takes care of fighting" on a team where everyone can fight, only to be undone by Linear Warriors, Quadratic Wizards, he finds a niche that benefits the team as a whole.