...Well, to start with, with Edie at least, he can take it as a given that she knows he doesn't want to threaten her or anyone else, and if she hears something that sounds like a threat what it really means is that Shadow Mountain was particularly terrible.
As for the rest...she's not sure she can condense a lifetime of social conditioning and experience with alternative social structures for him, not without transmitting her entire life experience which might well not overwhelm him considering how much longer his life has been but would contain things that aren't really hers to share.