Sigma

Sigma is a member of the Decay of Angels. He is also the general manager of Sky Casino.

Appearance
He is a young man with long straight hair that reaches his waist. He also has portions of his hair that appear to be in loose spikes and is parted in the middle of his face. He also wears earrings on both of his ears. He is seen wearing a long white coat with black pants. His coat has a sparkly or galactic design on the interior.

Personality
He appears to be kind to his customers at the Sky Casino, given the fact that he gave a customer another chance by saying that the game is invalid.

He also appears to have a strong sense of ownership. In a conversation with Teruko Okura to close the casino, Sigma refuses and even asks her who will reimburse the revenue and reputation if the casino were to be closed.

Ability
His ability allows him to exchange information with anyone he touches. The exchange consists of "giving" the person information they want to know, and thus giving Sigma the information he wants to know.

Background
It was later revealed by Fyodor Dostoevsky that Sigma himself was a person born from being written into The Book, this was later confirmed by Sigma who told that when he first opened his eyes and became aware of his surroundings, the first thing that greeted him was not a midwife or a mother but instead a vast desert, filled with nothingness and his only possession being the clothes on his back and a train ticket from a station that does not exist. Confused with his circumstances, he wandered around the desert nothingness until he was eventually captured by an armed group and held prisoner, where he eventually unlocked his Gift, causing his captors to then take advantage of his ability for their gain during his time with them. Eventually, he managed to escape from then and continued to wander the world nihilistically due to not knowing his reason for living or existing until he was eventually approached and invited by Fyodor to join the Decay of Angels and upon agreeing he was eventually also given the duty of overseeing the Sky Casino, a job he eventually came to love due to it giving him a sense of purpose. Somewhere along his time together with the Decay of Angels he eventually obtains information on the location of the "page" of the Book, as stated by Atsushi Nakajima.

Plot
In the operation of Hunting Dogs in finding Lucy Maud Montgomery, Teruko Okura lead a team towards the Sky Casino stating that Lucy Maud Montgomery and the others entered the casino, telling him there is a need to blockade the casino and deploy the police to every section. However, Sigma refuses to close the casino.