Yuuichirou Hyakuya

Original Name 百夜 優一郎
Romaji Name Hyakuya Yuuichirou
Nicknames Yuu, Yuuichiro Amane
Series Owari no Seraph
Age 16-17
Weight 59 kg (130 lb)
Height 170 cm (5’7″)
Date of Birth October 16, 2004
Blood Type A



The protagonist of “Owari no Seraph”.


Yuuichirou Hyakuya, the main protagonist of the anime and manga series “Owari no Seraph”, is a complex character with a strong and determined personality. He is known for his rebellious and hot-headed nature, often acting on impulse and displaying a fierce determination to protect those he cares about. Despite his tough exterior, Yuuichirou also possesses a compassionate side, showing deep loyalty and concern for his friends and comrades. He is driven by a burning desire for revenge against the vampires who took everything from him, fueling his determination to grow stronger and fight the forces of darkness.


Yuuichirou’s background is one of tragedy and loss. Abandoned by his parents at a young age, he found himself at the Hyakuya Orphanage, where he formed strong bonds with the other children there. However, their lives took a dark turn when they were captured by vampires and used as cattle. Yuuichirou’s family at the orphanage was brutally killed, leaving him as the only survivor. His traumatic experiences shaped his determination to join the Japanese Imperial Demon Army and seek revenge against the vampires who destroyed his life.


Yuuichirou has a striking appearance, characterized by his messy black hair and piercing blue eyes. He is of average height, standing about 170 cm, and has a lean and athletic build. He typically wears the standard uniform of the Moon Demon Company of the Japanese Imperial Demon Army, reflecting his role as a dedicated soldier in the fight against vampires. Yuuichirou’s intense and determined expression reflects his unwavering determination to overcome any obstacle in his path.


Yuuichirou is a skilled swordsman, trained by the renowned demon hunter Guren Ichinose himself. He possesses exceptional combat skills and is able to wield both enchanted and cursed blades. His fighting prowess allows him to defeat formidable opponents, including the mighty Horsemen. In addition, Yuuichirou carries the “Seraph” gene, a forbidden taboo in the world of the story. This gene plays a significant role in the overarching narrative of “Seraph of the End,” adding a mystical element to Yuuichirou’s abilities and potential.


Yuuichirou Hyakuya is a fictional character created by Takaya Kagami for the manga and anime series “Owari no Seraph”. The series, also known as “Seraph of the End”, is set in a post-apocalyptic world where vampires have risen to power and humanity is fighting for survival. Yuuichirou’s journey as the main protagonist revolves around his quest for vengeance and his growth as a demon hunter within the Japanese Imperial Demon Army. His struggles, relationships, and battles form the core of the compelling story.
Yuuichirou Hyakuya’s character development and the challenges he faces make him a compelling and relatable protagonist in the dark and action-packed world of Owari no Seraph. His unwavering determination, combined with his fierce loyalty and complex personality, contribute to his enduring popularity among fans of the series. As the story unfolds, Yuuichirou’s journey continues to captivate viewers and readers alike, making him an unforgettable and integral part of the Owari no Seraph universe.

Yuuichirou Hyakuya – FAQ

Who is Yuuichirou Hyakuya?

Yuuichirou Hyakuya is the main protagonist of the anime and manga series “Owari no Seraph” (also known as “Seraph of the End”). He is a young orphan who becomes a member of the Moon Demon Company, an organization tasked with exterminating vampires.

What is Yuuichirou’s personality like?

Yuuichirou is initially portrayed as a rebellious and hotheaded individual. He is driven by a strong desire for revenge against the vampires who killed his family. He can be impulsive and stubborn, but he is also fiercely loyal to his friends and determined to protect them.

What are Yuuichirou’s abilities?

Yuuichirou has exceptional martial arts skills and physical strength. He is a skilled swordsman and can wield the Cursed Gear, powerful weapons that are effective against vampires. He also has the ability to partially transform into a demon, giving him increased speed and strength.

What is the relationship between Yuuichirou and Mikaela Hyakuya?

Mikaela Hyakuya is Yuuichirou’s childhood friend and one of the few survivors of their orphanage. They share a deep bond and consider each other family. After years of separation, their paths cross again, but Mikaela has become a vampire. Their relationship is a major aspect of the series, marked by loyalty, conflict, and a desire to protect each other.

Does Yuuichirou have any memorable quotes?

While Yuuichirou has several notable quotes throughout the series, one of his most famous lines is: “Even if I’m alone, I’ll keep going. Even if I’m crawling, I’ll keep going. For the people I care about, and for the people who believe in me.”

Does Yuuichirou go through character development?

Yes, Yuuichirou undergoes significant character development throughout the series. Initially driven solely by revenge, he learns to value friendship, trust, and the importance of protecting others. He becomes more selfless and develops a broader perspective on the conflicts he faces, ultimately striving for a peaceful coexistence between humans and vampires.