[quote=@Prince of Seraphs]
[@Lucius Cypher] If Gren only has like ten percent of his actual flesh left wouldn't that mean his aura would drop in tandem. The more robotics the less aura. I mean the ability for a machine to generate aura was cutting edge, and only existed in a single prototype of highly classified Atlas tech. Gren's robotics are comparatively archaic and even allowing for the inevitable self upgrades getting to the level where his cybernetics could generate aura shouldn't be possible for the position he was in.
[/quote]

Well in canon the aura is the manifestation of a soul, which depending on what philosophy/religion/... you subscribe to can have nothing to do with the body whatsoever. Ironwood is a halfman and didn't seem any worse off.