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He was a young boy that always left his family's home and got “lost" in the surrounding forest. They used to call Wulf a sick child for his unusual behavior with other people, such as his dog-like behavior and how he casually talks about dark subjects and disturbing details about butchery and some medical procedures. The man has been seen talking to crows and worms… Totally a normal man!
Not the best with social standards but he is capable of some manners especially when he's around Wilson. Not interested in small talk and doesn't like strangers in general.
(his fullest name is Beowulf Heinz Willard)