Mammon

Mammon was named after the demon of greed because he was greedy. He loved us, and we loved him. He did chase people, and the towns folk poisoned him because of that. But he never bit people, he just liked to run. I knew because his tail would wag when he got home. I'll never forgive them.

Mammon's eyes glow at night, and its hard to see him when its dark. Which means you won't see him until he barks.