Encyclopedia Entry:
A type of centaur that lives deep in forests, distinguished by its beautiful white coat and a single horn coming out of its forehead. Even though it’s a monster, it is regarded as a “symbol of purity.” Its gentle personality and behavior are that of a chaste maiden.
In the same way as other monsters they make the man they like their husband to bear children by him, but unlike other monsters, they never attack and force intercourse. It is said that the men they are fond of and choose as their husbands are absolutely always pure “virgins” who have never had intercourse with other women or monsters. They themselves stay as pure “virgins” and never have sex with any men until they give themselves to their husband. They never give themselves to any man but their husband period. Sex with their man is the fulfillment of the oath between husband and wife.