Board Thread:Episode Discussion/@comment-24573226-20170121144613/@comment-30530552-20170122182945

84.195.99.91 wrote: I know all that. I'm sure it does the whole calming/fear suppression thing, it just doesn't explain the invisibility to me. The only argument I've seen is that the Nevermore didn't see them, but I don't think it would have seen them regardless. With the position Ren and Nora were in I feel the Nevermore would have had to bow its head down lower than it did to see all the way under the house. I think the Nevermore was about to look under the house because of the fear/negativity that was there, but it disappeared before it got the chance and it then got distracted by and followed a different source, which there would be plenty of. The Nuckleavee [man its hard to spell its name right every time] probably didn't bother to get them because it would've had a hard time getting under the house, being as big as it is. That, or its more sadistic then any Grimm we've seen before, and takes pleasure in scarring people. Maybe he's a Renora shipper, so he let them go.

As for the Nevermore, when they turned gray I had a hard time seeing them, actually. As we've seen with the Seer, their vision [or at the very least that creature specifically] is not as on point as that of a normal creature. Combined with an emotional and complete presence masker, it'd be near impossible to see them.