Is the forte of a Palico completely random?

So I'm working towards getting five of every Palico type, but it's proving a bit tricker than I expected. I seem to encounter some types (like healing) all the time, and other types (like support) rarely, which makes getting five of each really annoying. It makes me wonder, though, if the forte a scouted Palico has is completely random, or if there's any sort of bias based on the map, rank, or quest.

Is the forte of a scouted Palico which appears on a quest completely random, or are there factors which influence the forte of a scouted Palico?