It just hit me here how much of a fridge horror the concept of a person who can literally erase herself out of our perceptions.
Imagine, behind you, there is such a person, looking over your shoulder while you read this. But you don’t know that that person is there, because he or she has made you unaware.
Chilly.
Also: The same could be true to Katya! An even more powerful telepath could be following her, and she wouldn’t even know it!