Afaik, there's only a singe hermit at the latest update, the hermit north of the cursed castle, it may be still not available at the moment
Sorry so far I have found 3 other hermit mages but I forgot their location because I found them in the previous version maybe in version 24 that's why I forgot because it's been too long
I also think in the capital there are 2 hermit mages sleeping, my theory is maybe in the next version something will happen to the mages