
Brain Unglaus
From Overlord
Brain Unglaus is a supporting character in Overlord, a genius swordsman who once rivalled the kingdom's Warrior Captain, until one encounter with Shalltear shattered his confidence. He is voiced by Kōji Yusa in Japanese and Matthew David Rudd in English.
About Brain Unglaus
Brain is a genius swordsman who once rivalled the kingdom's Warrior Captain, until a single encounter with Shalltear shattered his confidence and his worldview. He spends years rebuilding himself as Climb's teacher and Gazef's comrade. His story is the human side of Overlord: what it costs a proud man to stand up again in a world of monsters.
Appearance
Brain is a lean swordsman with unkempt blue hair and sharp eyes, usually in worn travelling clothes with his katana close at hand. In his mercenary prime he carried himself like the kingdom's next legend; after his fall he looks like what he is, a talented man rebuilding himself in cheap lodgings, one technique at a time, with the haunted focus of someone who has seen the top of the mountain and been thrown off it.
Personality
Brain is proud, abrasive and honest about his own talent, he was a genius and knew it. Shalltear changed him in seconds: she caught his ultimate technique on a fingernail, and the knowledge that such a gap existed broke something in him. What makes Brain remarkable is the rebuild. Instead of drinking himself to death, he becomes Climb's teacher and Gazef's comrade, finds reasons to swing a sword that are not about being the strongest, and keeps polishing one impossible technique, a strike that might, one day, reach a monster.
Background & Story
Brain Unglaus rose as a self-taught sword genius whose talent rivalled Gazef Stronoff, the kingdom's Warrior Captain, and wasted his prime as a mercenary leader with nothing to believe in. Hired for a job in a cave near a village, he met Shalltear Bloodfallen, and learned in one exchange how far he was from the world's real heights. Brain fled, broken, and rebuilt himself in the capital as a teacher and ally to the knight Climb and his old rival Gazef, standing with the kingdom as Nazarick's shadow falls across it.
Powers & Abilities
- Fourfold Slash of Light: Brain's signature technique strikes four times in a single instant, refined over years of obsessive training.
- Nail Clipper: The technique he builds to surpass his limits, a strike designed to cut even a monster like Shalltear, named for the fingernail that stopped his best blow.
- Martial arts and Field: His warrior skills sharpen his senses and expand his awareness, the foundation of his genius swordplay.
Key Relationships
- Gazef Stronoff: His old rival and later comrade, the Warrior Captain Brain once wanted to surpass and came to respect.
- Shalltear Bloodfallen: The vampire who broke his pride in seconds and unknowingly gave his life its new purpose.
Quick Answers
Who is Brain Unglaus?
Brain is a genius human swordsman whose confidence was shattered by Shalltear, and who rebuilds himself as an ally of Gazef and teacher of Climb.
Who voices Brain?
Brain is voiced by Kōji Yusa in Japanese and Matthew David Rudd in English.












