Re: Auras in fantasy Firle, you and I must not be reading the same fantasy novels. I've read dozens of novels with visible auras (by that and a dozen other names) mentioned. They are fairly common, particularly in relation to using magic.
Oftentimes they are only seen by those with gifts/skills, though. They don't have to be visible though. In a few novels, and I cannot recall the names before anyone asks, they were an invisble force that could be "read" (felt would be more accurate). One with the gift could just glance at you and get insight into who you "really" were.