User blog comment:Kurare/Yoruichi Shihōin's Zanpakutō theory/@comment-4207271-20140820130019/@comment-25244173-20140820131534

might be so. but another fact is that she stayed hidden coming in and out the Soul Society without using the gigai like Urahara, nor barriers like the Visored. Maybe she even changes her reiatsu, although, lightning is a good idea, but an obvious one.