Einherjar are talented warriors, the blood thirsty foot soldiers for Asgardian army. They are vessels, human bodies magically molded from soil and water, given life with the soul of a brave human warrior. (Called Firar by the Gods)
Valkyries roam the realm of Yggdrasil in search of these souls. It is there sole purpose to seek out skillful knights whom are nearing the end of their mortal lives. Upon their violent deaths, the Firar will be captured by the Valkyrie, and transported to the realm of Asgard. This is where they will be implanted upon their new bodies, and serve for eternity as warriors to the Gods. That is, of course, till the end of days.
For your soul to be chosen as an Einherjar is a great honor for some humans. To those with different believes, it is mere torture. They live but a simple existence. Every day, they awaken early to loud crowing of a rooster. Within moments, they charge out to battle against other their kind, numbering in the millions; battling from dawn to dusk. At the end of the day, only a few remain standing. The human bodies are then recreated. The lingering firar will be once again placed into these vessels. The dead Einherjar are reborn, all wounds healed.
For the remainder of the night, they partake in a grand banquet. Feasting in the great halls ofValhalla, being served mead by women, whom they believe are their Valkyries. They speak of their daily battles, joking with the very men they had just cut to pieces earlier in the day. The champions of the day are rewarded by spending the night with the waitresses.
Upon the next morning, the same. Every day is the similar. An endless loop, a never ending training exercise. Each and every human warrior are training for the final battle. A large scale conflict of God, Beast, and man that will leave all Realms burned to ashes. This will be the end of days that will usher in a new Era, Ragnarok.