precog fails if person's face is truly expressionless

Suddenly, Kamijou’s reaction slowed when the next black wing was swung toward him.
If Kakine Teitoku had not gathered all of his strength and knocked Kamijou out of the
way, Kamijou’s entire body would have been smashed to pieces.
Fremea let out a shrill scream. Kamijou looked over at Kakine who had been slammed
against the ground in his place and then looked back toward Rensa in shock.
She must have altered some setting because her cyborg face had completely lost any
expression whatsoever. The rhythm of her blinking and breathing were mechanically
given a set interval as if she was timing them with a clock.
When she spoke, her words came at a uniform speed like a translation device.
“Your precognition can be prevented by restricting the information you can take in. I’m
a cyborg, remember? We don’t even have to get into electrophysiology to know that
humans can’t stop slight muscle movements no matter how hard they try. However, I
control everything with machines, so I can truly freeze my expression. If I wanted to, I
could be as still as a statue.”
She had sealed it away.
If he could not make his move before she did, it was impossible for him to defend
against Rensa’s supersonic attacks.

- New Testament Volume 7 Chapter 4 Part 9