Undertaker

Undertaker is the operator who responsible for regulating  spirits. Their job is to hold a funeral for wandering spirits, and freeing souls devoured by evil spirits. They works under the King of the Catacombs.

Each undertakers have a contractor who shares their soul. Riddle, for example, shares soul with Hayato Sakura, which keeps Hayato alive.

Funerals
Funeral is a kind of ceremony to send spirits to the Catacombs. The spirits will then be judged and determined to go to hell or heaven. However, not every spirit is easily buried. Evil spirits are against funerals. Therefore, an undertaker needs a contractor to defeat the evil spirit, while he's preparing the funeral. The contractor's job is defeating the evil spirit and freeing the souls that have been eaten by evil spirits, which is the source of their strength.

Current Undertakers

 * Riddle
 * Dante
 * Luka
 * Julian
 * Shall
 * Hiren
 * Hayato Sakura