Jack the Ripper

Jack takes the form of an adult man of average height with silver hair and a silver mustache. Jack also has heterochromatic eyes, with a left eye that is silver in color and a right eye that is deep red in color, the latter being covered by a monocle filled with gears. 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 trousers, 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 big fan of Shakespeare, usually quoting some of his poems while talking to others.

Jack loves fear Jack the Ripper admits he committed all those murders because he thinks the color of fear is beautiful However, underneath this polite and distinguished façade, Jack is a cold-blooded monster at heart as he gleefully murders people simply to bask in the sight of his victim's fear as they come face-to-face with death, even going as far as to describe the color as "absolutely beautiful". Later on it's revealed that much of Jack's twisted, cruel, and sadistic nature comes from a traumatic childhood experience where, upon discovering that his mother never truly loved him and only saw him as a tool for her to get out of poverty, he broke down mentally and eventually spiraled until he became the ruthless killer he is today.

Jack is also a natural liar. He repeatedly lied to Heracles about his Völundr as a part of his strategy to win his fight against the god.

However, after his fight with Heracles and later meeting with Göll, Jack seems to have shown a desire to change and move on, as well as a want to meet someone who truly loves him. Also, despite his ability to see the true feelings of those around him, Jack has demonstrated an inability to recognize his own, even requiring Hlökk to tell him that he felt sad about killing Heracles.

Despite his twisted and ruthless nature, Jack still has some kind of moral and humanity, helping a secret organization while he was alive to get rid off the worst criminals of London, specially if they are related with orphan kids who are kidnapped by rapists. However he chooses to take over the identity of the actual Jack the Ripper as he sees himself not different from the original, telling to Brunhilde that he could've been just like him if the conditions were different of those he had. His favorite food is apple pie.