Classroom Crisis

[David75]

For Nagisa, should he pursue his vengeance agenda, Iris is worth a lot, being the last Shinomiya living.

[Kraco]

For Nagisa, should he pursue his vengeance agenda, Iris is worth a lot, being the last Shinomiya living.

Sure, she's the original reason for seeking vengeance. So, he can't very well put her in any danger. I think he was relieved Kazuhisa seemed to believe Iris (the real Nagisa) is dead. Of course it could also be Kazuhisa playing it smart, as there'd be little profit in scaring Nagisa by revealing he knows who Iris is. In any case, he doesn't seem to be rotten enough to make a tool out of the person he has been living to protect so far. That could easily happen to a person living for revenge, but I doubt Mizuki would fall for such a person.

Iris could of course reveal herself all on her own, especially now if she thinks she's all alone with Mizuki coupling with Nagisa.