The great thing about the character, Marcus, is that you can not only see his cute face (excluding his eyes...) you get to battle with him. He has the same controls as Blank and Cinna, except that he has a sword. He generally has the same equipment as Steiner, with swords and armor. He only has one skill command, "Steal", hence, the reason why he can steal objects. In fact, he's a pretty good theif.
When Marcus is searching for the super soft you are able to control him, and watch ATS of him talking to people and his friends. You can also ride the gargant(ooh, what a cute creature) with him around. You can battle with him for awhile here too.