"Power armor," or mechanized battle suits with exoskeletal enhancement, should be as nimble as an athlete or an insect. The wearers should be able to run, leap, crouch, and turn quickly, to get as much freedom of movement on the battlefield as possible. Weapons are often built into the armor, as well as carried. Sometimes it's hard to tell whether the unit is an organic human or humanoid being inside a suit, or a purely mechanical robot.
Ink and greyscale marker on sketchbook page, about 8 1/2" x 2 1/2", October 22, 2013.