The only advice I can give is, to just give Crandles time to warm-up. From what it sounds like she has been the only cat for many years, then this wild child shows-up. I think I would hide too, LOL!! XD

When I introduced Jaden to Jiraiya, believe it or not Jaden started to groom Jiraiya right away. To this day he is still very motherly towards Jiraiya. I think I said this before, but my Jaden looks a lot like your Crandles.

Did you get my PM by chance?!