@Buff - I think she needs to see the enemy to predict the bullet trajectory. She isn't psychic. She saw the gun when Tombitch did a no-look behind-the-back shot (which she still dodged), and based on her position and field of view, she would've also seen Tombitch when she dodged the bullets right after pushing away Noobitch.
So she would have been shot by Fuki if Takina didn't show up with the punch then.

I went back and they did show Chisato turning around just before the AK47 and hair tie were fired those two cases check out.