Yen is a character from the indie adventure game The Mooseman and the creator god of the world in the game's mythology, Yen hatched from an egg laid by a duck floating on a boundless ocean. From the shell of the egg, the Middle World was created, and from Yen's reflection, the Upper World was created. Yen also has moose heads, which were used to create the Upper World. He is the father of seven demi-god sons, including the Mooseman, who learned to communicate with spirits from their father and human feelings from their mother.