Who are they loyal to?
It was a false alarm.
Kyran thought that the Werewolves would be useful captives, but they were not.
Instead of being captives, Jarvald and Vivian seemed to be allies of Rex from the near past.
Even though both of them, didn't seem to be lying about that—considering that both of them claimed to help Rex connect with the Witch of Chaos, which was a big claim, he still needs to make sure they are legit by taking them to Rex himself.
He would at least give them that chance.
Rex has always been the man of his word from the very start.
So if he promised them safety and assurance, Kyran would make sure not to betray that.
As he finished the task of punishing the associated Dark Elves, Kyran, would need to head to the city since there should be a lot of safety precautions—that the city is going through. One was the fact that the food supply might be running low.
He could go on a hunting spree in the Humming Damned Forest.