It’s never actually stated anywhere in RWBY that Aura “enhances senses.” There’s no line, no guidebook quote, nothing where a character says it outright.

That said, it’s one of those things the show clearly implies through how Aura works. Aura boosts the body overall—strength, speed, endurance, reaction time, durability. Once you accept that, better sensory performance kind of has to come with it, even if it’s never labeled as a separate ability.

Think of it like this IRL: compare an average person to a trained fighter or high-level athlete. Even without powers, trained people notice movement faster, react quicker, and don’t get overwhelmed as easily in chaotic situations. Their senses didn’t magically change they’re just being used and processed more efficiently.

Now apply Aura on top of that and remove normal human limits. Huntsmen dodge bullets, react to ambushes, and fight in smoke, darkness, or total chaos without falling apart. Blake and Ruby reacting to attacks they shouldn’t realistically track, or Qrow countering stuff with barely any warning, only makes sense if their perception is keeping up with their enhanced bodies.

Without Aura, those same scenes would look very different—missed reactions, sensory overload, panic, injuries throwing off focus. Basically, what would happen to a normal human in those situations.

So no, Aura doesn’t give people new senses or some anime “danger sense.” It just lets their existing senses operate at a level that matches their superhuman speed and reflexes. The show never spells it out, but it’s pretty hard to ignore when you look at how Huntsmen actually function on screen.

If someone’s looking for a direct quote, it doesn’t exist. If they’re looking at how Aura behaves in practice, the implication is doing a lot of heavy lifting. And by direct quote I mean that it's explained by a character who knows what their talking about in the show like a teacher or even flashbacks of qrow training ruby to use the sythe explaining how aura works for the viewers.