Sei bears the title of Dragon King of the East, or "Ryuuou", and is often called "Ryuu-dono" as an honorific. He also bears the titles: prosecutor of the east and young emissary. He controls the night of Hong Kong and the Special Zone, protecting Red Blood and Black Blood. He's a direct descendent of a chaotic bloodline. Sei also created the barrier and implemented the restrictions that protects the Special Zone. His eyes are the "switch" for opening and closing the barrier. When he opens his eyes, the barrier opens, and vice-versa. He can turn into an enormous golden dragon made of pure energy. Before the start of the story, Sei's appearance looked that of a person in his low twenties. Sometime in the past 10 years, he was reborn as a young child. Even though he was reborn into such a cute state (as Jirou puts it), Sei is serious and is one of the most powerful vampires in the story, which makes him highly respected. He could easily make a vampire uneasy with his powerful aura. He also has an older sister called the Dark Princess of the North.

A decade has passed since the war between humans and vampires, when the infectious bite of the Kowloon Bloodline set the streets ablaze. Today, Jiro travels to the Special Zone, where the peace between vampires and humans is threatening to crack. As a new battle erupts between human soldiers, vampiric refugees, and Kowloon Children, Jiro must draw the Silver Blade once more.<br>
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(Source: Funimation)

Carrie Anne Savage is an American voice actress known for her work for New Generation Pictures, Studiopolis, and Funimation/OkraTron 5000.

[Wiki (jp)](https://ja.wikipedia.org/wiki/%E9%AB%98%E6%9C%A8%E7%A4%BC%E5%AD%90) | [Wiki (en)](https://en.wikipedia.org/wiki/Reiko_Takagi)

Reiko Takagi is a Japanese voice actress and narrator affiliated with Sigma Seven.

[Official Website](https://www.rieke-werner.de/) | [Synchronkartei](https://www.synchronkartei.de/sprecher/3279/2) | [Instagram](https://www.instagram.com/strawbellycake/) | [Twitter](https://twitter.com/rieke_werner) | [Soundcloud](https://soundcloud.com/riekewerner) | [YouTube](https://www.youtube.com/channel/UCXcDQvUYX1oCtx53ueUAaEQ)

Rieke Werner, also known under the pseudonym StrawbellyCake, is a German voice actress and singer.

Ten years after the Holy War in Hong Kong, Mochizuki Jirou, aka the Silver Blade, and the lone hero who fought and defeated the Kowloon Children despite the loss of his lover, returns to Japan with his young brother, Mochizuki Kotarou. The two quickly discover that the Kowloon Children who survived the Holy War are seeking to infiltrate the "Special Zone" ,a thriving city protected by an invisible barrier that will not allow Kowloon Children entrance, unless they're invited. Red Bloods refers to the humans; Black Bloods are the vampires, and the Mochizuki Brothers are Old Blood, the last descendants of an elite clan of vampires. When Kotarou is abducted by one of the Kowloon Children, Jirou has no choice but to fight once more.