Victor didn't have much he could say, but he nodded and ate. He was fairly sure he would assume everyone around him was now a unicorn, he had no doubt of that. But to know your grandfather was someone who had done terrible things, Victor didn't think he could deal with that. Sure, everyone did things they weren't proud of, but Victor knew a bit of mythology and as Kat said, the Greek myths were full of absolutely wretched things.
"I'm sorry," he said and then he shook his head. "I don't even know what about. I just am. I-is he good to you? Your grandfather?" He didn't want to say Hecate's name in case she came after him. He was fairly sure she was pretty scary from the few things he had read about her.