YUKI in Norse Mythology. ...YUKI See bil and yuki.. Each world also had significant places within. Valhalla is Odin's hall located in Asgaard. It was also home of the Einherjar, who were the souls of the greatest warriors. These warriors were selected by the Valkyries, Odin's mounted female messengers. The Einherjar would help defend the gods during Ragnarok. Niflhel is a hellish place in Hel, where oathbreakers and other criminals suffer torments.