William recalled that in the final battle before the world fell, that dude was one of the famous figures at the academy by then.
He sole-handedly fought an army of monsters who were trying to get their way to chase the runners from the academy. Thanks to his efforts, people like William managed to escape from this carnage with their lives.
William didn't know if Peter was the same person he had in mind or was related to him in some way. Yet William knew such courageous acts came at the price of losing that dude's life.
William didn't like to owe anyone debts. Even if Peter wasn't that dude from his memories, he was still related to him. and that already told William a lot about what calibre this young spirit master in front of him was made of.
So, he decided to keep Peter close, while keeping a closer eye over Tod.
"Hahahaha, I heard otherwise," Peter laughed for a second before adding, "welcome to year two class. You deserve being here."