Board Thread:Episode Discussion/@comment-4141313-20181201123231/@comment-25110963-20181201193455

I think it's important to take note of how the Apathy aren't as ferocious as other Grimm types. They're actually very docile, like the Seer. They don't attack unless given a reason.

As for the Silver Eyes, we at least have some more valid information. However due to how inexperienced Ruby is with her powers, the effects of her eyes vary. They are capable of harming Grimm, or outright killing them if exposed long enough, but can also petrify them. Again, inconsistent results, but hopefully Maria can shed some light on this later, no pun intended. But Taiyang said the Grimm frozen at the school is still alive. And the homing instincts with the Grimm seem to be very strong.