WN/Adalman

Guardian of the 60 floor. He made Rimuru his new "god", after being transformed into a Undead King. Albert is his confident.

Abilities

 * He can summon endless ammounts of Ghost Knights and Ghost Wolves. He can also summon a Death Dragon.
 * Holy-Demonic Inversion: holy attribute is reversed into demonic attribute.
 * Has the abilities of an Necromancer.

Background
In the past, they had gone to conduct a purification with good will to prevent the outbreak of a large-scale dead-spirits disaster in the battlefield in The Jura Great Forest.

In doing so, Priest Adalman and four holy knights had gone together, but they had encountered an unexpected situation.

When they had arrived at the battlefield's remains, a Zombie Dragon (Carrion Dragon) an atrocious monster, was living there.Although they had succeeded in defeating the Zombie Dragon after a desperate fight, they had used up all of their strength there.

There was no one to come rescue them, since they hadn't acted on the orders of the church, but based on their own convictions. Thus, their fate was sealed, but their hearts, which wished for the peace of the Great Jura Forest caused a miracle.

Adalman’s group transformed into ghost after receiving the curse of the dead, and a large amount of magic essence. However, with their strong willpower, Priest Adalman and Holy Knight Commander Albert succeeded in keeping their egos.

The Ghost King Adalman who, had acquired the abilities of a Necromancer (Dead Ruler), was dominating the dead spirits in the surroundings, and stayed inside a cave.

That was an old story from more than several hundred years ago.