He's not actually a single person, but a title passed down through generations within the organization known as The Clan. Each Undertaker is responsible for maintaining the balance within the prison, keeping order, and ensuring the success of the Deadman Wonderland game.
Here's what we know about The Undertaker:
* A powerful Deadman: They possess incredible strength and a unique power known as "Black Blood".
* A mysterious figure: The Undertaker's identity is shrouded in secrecy, with only a few people in the prison truly knowing who they are.
* A dangerous enemy: The Undertaker is a formidable opponent, capable of inflicting devastating damage with their Black Blood.
* A complex character: Despite being an antagonist, The Undertaker possesses a sense of honor and a strong belief in justice.
While the current Undertaker's identity remains a mystery, his presence significantly influences the events of the story and creates significant challenges for the protagonist, Ganta Igarashi.