I don't know if Regulus will bring it up on his own or just bottle it deep down inside him until it comes out in an unhealthy way. (It's usually the latter with him.)

That's very interesting! Regulus would be like 'does he control the wind, cuz that would be real bad!'

Here's Regulus' experience with the woods' people. So he's got some knowledge that the others might want to know, he just doesn't know he knows things now.