I get the time difference thing, but I feel like no matter how reclusive someone is, they would probably hear the name of their ruler/queen/king at least once if even only in passing (i.e. going out for groceries, supplies, etc.). I make this point because if Cain does ask, I don't think it will be very believable for him to just shrug his shoulders and say "Beats me, man." You know? He could at least know that it's not anyone named Midna. 

In the end, it's up to you though. You know you're character better than I.