Adalman

Adalman (アダルマン), formerly the Index Finger of Clayman's Five Fingers, is an undead and the guardian of the 70th floor of Ramiris' Labyrinth.

Appearance
He is basically a skeleton wearing clergy robes. However, he was shown to be very fond of the look, as he remained as a skeleton even when he has the ability to construct a body in the labyrinth.

Personality
As a former follower of Luminous Faith, Adalman showed extreme reverence towards Luminous, which allowed him to become the best Holy Magic practitioner. Even after changing his faith to "Rimuruism," his trait as a fanatical follower hasn't waned one bit -- rather, it's gotten even stronger. Due to this, Diablo and Shion feel an affinity towards him, much to Rimuru's annoyance.

Background
Adalman was once a cardinal in the early days of the Western Holy Church, when the organization hadn't attained the reputation it has today. He was born a prince of a small nation under the rule of Holy Empire Ruberios. He was an exceptional practitioner among the recruits of the church, and with his elder brother occupying the throne and already having secured a new heir, Adalman devoted himself into spreading the name of Luminous as a templar knight. He was deeply fascinated by the god Luminous and her works, and even believed her to be real.

His devotion landed him the rank of cardinal (the highest rank in the church) and became the greatest master of holy magic in his era. However, his position in Ruberios' noble hierarchy wasn't very high, so he redoubled his efforts and expanded his magic to other types. Along the way, he would hold long discussions with his best friend Gadra as he continued polishing his skills. Eventually, his efforts paid off, and he became an Enlightened.

As time passed, he was one step away from becoming a Saint, but that never came to be because of the sinister plans of the Seven Luminaries. Fearing his rise in power, they tricked him into setting off to quell a large army of undead threatening their people. Oblivious to their true intentions, he took off with his trusted friend, Albert, along with an expeditionary force that admired him. Awaiting them was a legion of undead led by a Death Dragon at the far edge of the Jura Forest, which became their death place.

Adalman eventually fell in battle, but his close friend Gadra casted the secret art he devised, Reincarnation, on him. However, because the ambient miasma had tainted his soul, he was reborn as a wight. His newfound appearance caught the attention of the then Demon Lord Kazaream and, ever since, he had been tied down to the land by a curse and forced to defend it as a servant of Demon Lord Clayman for a thousand years.