The 'people' who have carved the Safe Zones out of the hostile territory inhabited by monsters. All fertile humanoid species can interbreed, and all babies are born human. When humanoids begin their working career they choose one basic Class which defines their abilities and Skills. Many humanoids remain in that Class for the rest of their lives. If, instead, they slay sufficient monsters or work equivalently hard in other ways, they can choose a species to transition into. This takes a month or more as they their size, shape and even biology changes dramatically. If they advance even further, they become eligible to receive an advanced Class that enhances their abilities further. The most powerful humanoids in the world are even able to gain a second advanced Class and an Evolution of their species. Humanoids have a special bond with all animals. Animals will not attack humanoids unless provoked or desperate.