Sheena

She's one of those people who, always being a bit mad, will recognise me as a bit mad, and never consider the fact that perhaps I am exploiting my madness in such a way I gain comeuppance upon her -- precisely because she -- of course -- is exploiting her own madness to gain comeuppance upon everyone else.

This isn't an equal match. She is more desperate than me, and, were I desperate, she would be the first to know it. My security, in fact, is a kind of -- security. I succeed precisely because she has not figured that I can, or planned a scenario around it.