Controller and Seeing NEN

A Nen user trains to manually open and close their aura nodes so that they can control the flow of their aura. One can learn this process gradually, learning to control the aura nodes through meditation, or they can receive an influx of aura from an experienced user that forces these nodes open, forcing the new user to learn to control the flow or risk severe exhaustion and/or death. The second method is generally frowned upon as it very dangerous (although far quicker). Once one has opened their aura nodes, they will be able to see their aura as a shroud surrounding the body. Some people are able to 'discover' and learn to manipulate their aura on their own, without any teaching or guidance from another Nen user.