Board Thread:False Info and Speculative Discussion/@comment-24.130.28.230-20150721180826/@comment-4091815-20150722012924

Alacraneo wrote: It's also possible not all supernatural creatures are affected in the same way by the stuff. Maybe some are more sensitive to it (i.e weres and the like) or maybe Lydia and Meredith, by their very nature as Death's messengers  are, plainly put, inmune to  a lot of supernatural things ( remember, they are also inmune to terianthropy,  for example).

I don't think it works as a ward against evil intents only. For instance, scott couldn't come across a mountain ash circle to save deaton when he was hanged at the bank vault

Deaton was quite clear. Nothing supernatural can cross mountain ash therefore, Lydia is not supernatural.

Banshees are not, within teen wolf canon, death's messengers.

Scott forced his way through a mountain ash barrier. Lydia is completely unaffected by mountain ash.

NervousShipper wrote: yet. there's none yet. mythology is constantly changing in these shows.

This site only deals with what is shown on screen. That's the canon of the show and the reason this site exists. Speculation is fine but, once canon is settled, kind of pointless.