Jack the ripper

He is an adult man of average height with silver hair and a silver mustache. Jack also has heterochromatic eyes, with a silver-colored left eye and a deep red right eye, the latter covered by a gear-filled monocle. He also wears a gray Victorian-era formal suit with a white shirt underneath and a blood red steampunk top hat. Jack also wears blood red pants, a blood red coat over his suit, and a pair of black gloves.

Normally, Jack has the disposition of a typical British gentleman, accentuated by his sophisticated diction and actions. He is also a great admirer of Shakespeare, and often quotes some of his poems while he talks to others. However, beneath this courteous and distinguished facade, Jack is a cold-blooded monster at heart who gleefully murders people simply to enjoy his victim's fear when they come face to face with death, even going so far as to describe the color as "absolutely beautiful". It is later revealed that much of Jack's twisted, cruel, and sadistic nature comes from a traumatic childhood experience in which, upon discovering that his mother never truly loved him and only saw him as a tool to get out of poverty, collapsed. mentally and eventually skyrocketed into the ruthless killer he is today.

A unique power possessed since birth, Jack's right eye possesses the ability to see emotions. people's emotions like colors. By observing a person's "soul", Jack can discern their true intentions from even the slightest change in color. During his killing spree, Jack used his right eye to see the true colors of anyone he saw to kill or evade, which could be the real reason he was able to escape the police force.

The arena where the Ragnarok fights will take place is a place similar to a coliseum.

Ragnarok is in the world of the gods, a space where The gods can walk freely but the humans participating in the fights only have access to certain places such as the infirmary or the special rooms where they will stay until Ragnarok ends.