Tricks. It's all about tricks with Naoko. She loves them. No, correction, not the tricks--their reveals. She gloats in her cleverness. It verges on the unhealthy.
He doesn't understand that at all.
He wakes from dreams that she's pulling the wool over his eyes, dazzling him with sleight of hand, all part of an elaborate illusion, as she disappears down a narrow path, over a cliff, gone.
Her propensity to vanish is, Ueda thinks, her ultimate trick. It doesn't matter.
He's no fool. He's just as clever as she is. She may leave, but he has his own tricks.