A wulver is a creature from Scottish folklore that is said to live in the remote areas of the Highlands. It is like a human, but with the body of a wolf.
Imagine a person who looks like a wolf, but can still walk and talk like a human. They are very kind and helpful to people, often leaving fish at the doors of those who are hungry.
However, they are also very shy and don't like to be seen. They only come out at night and will run away if they feel threatened.
So, in short, a wulver is a friendly wolf-human creature that helps people in need but likes to keep to itself.