[dirtywick]

Well, there's the ethereal assassin which is mentioned. I've gotten him in a misfortune scale though.

There's the Animist, N2 mage, which comes with a couple dozen boars (doesn't seem to be able to call allies or anything like that though, but the description says they get more vinemen when they cast that spell) and a magic site, the Animist's Hut which gives 1N. That's a random event and I've gotten it with both Luck and Misfortune, and it also seems somewhat common.

I've gotten an A2 mage as a random event that's nothing special as well. Something about coming from a magical tower and would rather serve you than die in the message, not sure exactly what it said.

Like Nick K said, it's not a big deal as they're usually not greatly powerful or anything, but they can give you access to other paths you normally wouldn't have. I wouldn't plan around it happening though.