A group of spelunkers takes a few observations/short conversations with the one you chose this animal companion at some point in time to kill ninja werewolves.

"Why haven't they spotted us, do you think?" he said to the nearest werewolves. "We're clearly among them. We're eating their meat. We're pillaging them. We're downright winning." He aced his sword through the neck of a native. "We're like invisible gods."

"But you must confess, that we are, beastly, yes? That even in our judgment of them, we have an animal instinct force, driving us?"

"Sure, Gladius. But we were the ones who said this. At some point in time, you need to come in and kill the ninja werewolves. Now, we rule the ninja-sphere."