Talk:Penny/@comment-74.77.173.62-20131116214825/@comment-120.150.90.164-20131121052302

well penny is a human, and the knife/sword/laser thing is her weapon called Puppeteer, which is actually a backpack she wears, if you look closely in episode 15 she has nothing on her back, but in ep 16 she wears the backpack. The swords are controlled by wires which you can see at some points like when she ancors herself before she shoots the laser. She's not actually a robot or a puppet or whatever, but I think she was just designed to look and feel kinda like one.