Arnold was a victim to that and the human, who bought him as a slave, had his animals ears ripped out. His ears, the pride of a beastman, had been taken away eternally just because the human had happened to be in a bad mood.
“I see now.”
It was related to Hiiro, since he was a human too. One of the ‘Humas’, who persecuted the beastmen, not just Arnold.