User blog comment:Jkphantom9/Volume 3 Episode 9 Preview/@comment-25110963-20160113220712/@comment-26100685-20160113231723

Because Penny's Swords are the most inconsistent weapon in the entire series thus far. In Black and White the whole sword comes out of her back, the original unit then splits to become many swords, this seems plausible for the slim and slender blade, but not for the handle and hilt. The hilt and handle are both rounded and wider than the blade, yet do not change shape, size or volume when the complete unit splits to form the many swords. It just doesn't make any sense.

When considering the strings, it is very hard to say what blades seem to float and which are bound by string, as the strings themselves are very thin and sometimes are barely visible. Certain moves Penny performs where she spins her blades around in front of her would be impossible. Her blade shield she performs to deflect two White Fang grunts away from her and her laser blast charge both would cause her strings to pass through or around her at awkward angles which seems very inefficient and impractical for a combat specialized robot. It's entirely possible that Penny has some form of aura that allows her to manipulate the position of her swords with and without the assistance of the strings?