Has anyone figured out if it can be completed successfully?
After testing a little, I found out that the quest is only available after your HQ upgrades for the first time. That means that the porps-kin will already be recruited into your castle.
That leaves the furious roar and the auster folk. I haven't tested it, but I think that the furious roar would have already been seen due to Zahra's encounter with Cougar.
That leaves only the auster folk. Perhaps it can only be completed if you did not recruit Muro and Gordo when your HQ upgrades?
Also, do scribes count as non-humans for this quest?