Weapon manifestations? How are weapons manifested? Are they magic? Are they physical and stored somewhere? I don't quite get how this process works. 

It seems like they are embodiments of the user's personality but at the same time they don't look like they need magical power unless they use certain techniques.

The long and short of my question is. What are the weapons in this series? And how are they manifested?
To my understanding, the weapons that they use are manifestations of their soul's power. They require a minimal amount of magic to actually manifest, but more if you want to do anything more than cut, bludgeon, or, in the case of Illusory form, drain energy.

Hope this helped!