Human

As you know, humans are the most proliferate form of intelligent life that inhabits the world. The magical power and physical abilities of humans who haven't received training are far lower than that of the monsters. Most humans are no match for attacking monsters, and they're easily knocked down, which leads to coupling, and soon after, they're taken home by the monsters.

However, depending on training, the abilities of humans can grow immensely. Those who have received advanced training, those who have gone through many battles, those receiving divine protection, etc. are called “champions” or “heroes.” They are far more powerful than an average monster.