A Valon is someone who has endured years of heavy training and studying to become a highly skilled monster hunter.
Most Valons travel village to village, and city to city in search of work. They accept monster contracts, then kill the monster/s using the extensive knowledge they received in training. They make good coin doing this.
“In a world where hundreds of different monsters roam, knowledge is indeed the key. It decides whether a monster-hunter will remain the hunter, or become the prey.” ~ Evari Quickblade, Master Valon