Board Thread:General Discussion/@comment-3257939-20140521172812/@comment-10390252-20140523104759

Everything depends on the definition of 'soul'. FWIW, what Pyrrha said sounded a lot like semi-religious propeganda that was hammered into her head from childhood rather than something based on any objective scientific enquiry. It's easier to persuade your children to go out and fight and die against the Enemy if the Enemy is an 'other', not really alive or something in that nature.

That said, the existance of Aura as an expression of 'soul' that is detectable by sensor systems would suggest that the Creatures of Grimm are at the very least a very different form of life based on very different basic principles.