Seras Ashrain  

Mist Barkas, The Valkyrie, セラス・アシュレイン

Seras Ashrain, previously known as the leader of the Holy Kingdom of Neia's knights, is believed to be a princess from a High Elf nation. She left Neia before its conquest and annexation by Bakuos Empire. In the forest, she encountered Touka Mimori while trying to evade White Walker, a mercenary group.