Drawing inspiration from Big O, Power Rangers, and others, we formed our team with specific combat roles in mind. Think your typical D&D campaign. We had a heavy brute robot, a sniper robot, a rogue/assassin robot, an engineer robot, and even a mage robot. My robot was the valiant leader of the group.
Here are some pages from my sketchbook showing my creative process. Since I draw robots all the time this wasn't really work.
Above, I started with a rough silhouette to figure out the pose. The leader needs to show confidence, courage, etc. Though it didn't appear in the final product, I liked the wide legged stance. Very Kurosawa. The big sword with the saw blade stuck til the very end.
...And there's the final project. I'll post more of the actual construction process later. Looking back, it's fun to see my process of working out a design for the robot.