King Vi III

"That's King Vi III. Victor to be exact. He's the King of Vale. Queen Elizabeth II may be dead, but I'm telling you, her legacy will linger on in Remnant, starting here, in Remnant. Oh, and Prince Harry and Markle also died together when they got poison gassed by Middleton as a sign of revenge during the Prince of Wales War. Yet what's worse than that though is that he fears about the Beacon War coming on."

--Su Ji-Hoon, Shrouds of Mystery

King Vi III is the king of Vale at the time of the Beacon War and World War III.