The characters from Undertaker Riddle include:
Voiced by: Takahiro Sakurai (Drama CD)A high school student, haunted by ghosts. He met Riddle and at first declined the offer to be an undertaker but at the end he had to agree in order to save his life from an evil spirit who already made him lose half of his soul. To get a chance to get it back, Hayato must become an excellent undertaker to have an audience with Riddle's superiors and ask his soul back.
Voiced by: Koji Yusa (Drama CD)In charge of making ghosts go to the afterlife and make proper funerals to exorcise evil spirits, Riddle bonds Hayato to him, giving him half of his soul. Loves to appear out of nowhere, mess with Hayato's head and act kinda childlike but he's very good at his job. Most about him and his past is unknown.
Catacomb of Souls
Secretary BradOne of Riddle's superiors. First seeing testing Hayato to see if he's suitable to be a proper undertaker. Has a dislike for humans and human stuff.
FaustThe king of the afterlife, who judges if the souls should go to heaven or hell. Interested in Hayato since Riddle did a contract with him, being just a human. She's actually a woman. She also holds a "Twilight's key"
Julian and ShallAn undertaker sibling team who are looking for Hayato's missing soul.
Ansem and LukaAnother team of undertakers, also looking for Hayato's soul.
Dante and HirenAnother team of undertakers.
NoirAn Evil spirit who's looking for Hayato as he's the "Twilight's key" who's wanted by his master.
EveAn evil spirit that used to be an undertaker who's member of The Arcana under the position of the 7th arcana.
Roen (Messiah)The first Arcana.
DioDante's little brother, who kill him and betraying him, as memberr of the mafia family and the fourth evil spirit of The Arcana.
Naoya SakuraHayato's little brother.
NemuroAn student from St. Paulo academy, where Riddle and Hayato go to investigate a series of murders. Since the killer is targering blonde students, he's a potencial victim.
Professor KurotouA profesor of St. Paulo and Riddle and Hayato's suspect.