... actually, I'll just say now because there's quite a few magically aware characters who would notice if they got close: the glow is basically mana. Barely filtered, completely uncontrolled and--when the glow's bright--alarming amounts. There's a good reason for it. xD
Anyone with magical experience would know exactly what it is from the feelings that causes.
Anyone with magical experience would know exactly what it is from the feelings that causes.