Seras Ashrain is the Captain of the Holy Knights of Neah. It is said that before coming to the Holy Kingdom of Neah, Seras was a princess of a High Elf country. Seras fled Neah before it was invaded and annexed by Bakoss Empire.
Sera’s met Mimori Touka in The Dark Forest in the Kingdom of Ulza while being pursued by the mercenary group White Walker. Seras considered Touka her benefactor after learning he killed the White Walker mercenaries. After Touka aids Seras in various ways several more times—some of them unnotticed—he offered to hire Seras as his sword and guide to the Forbidden Witch in The Land of the Golden-Eyed Monsters. Seras agreed. But it was after Touka defeated the pursuing Black Dragon Knights and their leader, Civit Gartland, Humanity’s Strongest, that Seras decides to follow Touka to the end of his journey as his loyal sword and companion.