Arthur, - a troll - is the leader of the Avocado Pear farmers who live near the Avocado Basin. Arthur is visually a cross between Lemmy, Prince Charles and Lionel Jeffries, and verbally a cross between Elvis Presley and Prince Charles. He’s an awfully nice chap if he’s on your side. If not, you may well get a crossbow dart up you, just when you are least expecting it. He eats mint humbugs.

When Ergo meets Arthur, he and his mates are bemoaning the fact that everything they planted hasn’t gone pear shaped this year, so it’s a good time (timing wise) for them to join Ergo and his army in pursuit of the evil Pigfrogs.