Brain Unglaus ブレイン・アングラウス

Brain is a warrior turned mercenary after he lost to Gazef Stronoff in a grand tournament to determine the strongest fighter in Re-Estize Kingdom. He has brown eyes with blue hair and the appearance of a wild beast. He is equipped with a chainmail and wears a necklace and ring which are infused with protection magic. His whole body is lean and his muscles are tough as steel and tempered through experience.

Originally a farmer, he was gifted with what could only be described as a God-given talent in the mastery of the sword. He has always believed himself to be the strongest fighter inside the Kingdom, having never lost a fight before he entered the grand tournament to decide the King's guard captain. He easily fought his way to the final where he faced off against Gazef Stronoff. A grand and close battle ensued between the two, but eventually,​ he would taste his first defeat at the hand of Gazef.

His fame was shattered and his confidence as an unbeatable warrior took a hit. He then decided to do everything he could to become stronger, so he would truly become unbeatable. At the same time, in order to make a living he started working as a mercenary for the Death Spreading Brigade.

He eventually does a complete overhaul after meeting Climb and Sebas Tian. He changes to a much friendlier person that starts to think that strength is more than simply being skilled with a sword.

In his second encounter with Shalltear, he managed to chip off Shalltear's pinky fingernail using Fourfold Slash of Light.

In the web novel version, he becomes a vampire under Shalltear.!~