Isaih was a masked Bloody Knight who had a skull face. In Mr. Winkler's Diary, Isaih was revealed and he laughed. In Part 3, he dueled Sarah and she was injured when a werewolf ran over to her and almost ate her flesh. He died from Contessa when she was mad he didn't bring Boo to Mr. Winkler so she sent a herd of werewolves after him to eat him.
- Mr. Winkler's Diary
- The Battle, Part 3