Rion has been exhibiting stronger psychic powers as of late, which will only continue to improve over the course of the next few months. He also has an ability called Scan. I explained this a little while back. Rion may be able to sense Slade by Scanning and get sort of get an idea that something's up, and he's being watched.

A log or a quicklog would probably do. After resting up at Budehuc with Nash, Rion would return to the Western District to work on Bending and his own abilities. Typically he does this alone because his powers are super destructive. Slade is welcome to creeper around while Rion is doing that.