Dungeon Master

Information
A Dungeon Master is the manager of a dungeon, and can expend Dungeon Points (DP) to make rooms, set traps, and summon monsters. Many dungeons have them. They have Absolute Authority inside the dungeon's territory, even to the Dungeon Core:"'I investigated how much weight my orders held and learned that Rokuko’s body would execute them on its own.'"Anyone with intelligence can become the master of a Core they match wavelengths with. Though it is believed that there are some other requirements involved, with names and such.

Masters tend not to advertise themselves very much, so it’s still mostly unknown what requirements there are to become one.

The Core and its Master are fundamentally 1 person as if the Core is destroyed the Master dies with it. However in reverse, the same does not apply as if the Master dies the Core can live normally.

How Keima became one
“What? Masuda... Master Keima...? Is that a fake name or something? ...Wait, what did you just make me sa—“

“Keima Masuda has been recognized as Dungeon Master.”

“Wha?” “Wha?”

Rokuko and I both said the exact same thing at the same time. A transparent, green window popped up before my eyes. It looked like the kind of message window you see in video games all the time. Written on that window in white letters was a message describing that I had been recognized as this dungeon’s master.

Known Dungeon Masters

 * Keima
 * Redra
 * Lyon Laverio
 * Leona