Wilhelm Grimm Purple eyes. Shoulder-length blonde hair parted in the center. Scornful, half-lidded eyes. The younger brother of the Grimm Brothers, world-class criminals at the top of Interpol's most-wanted list and genius crime consultants. His older brother is Jacob Grimm. Jay handles the intellectual side, while Will handles the field operations. He is proficient with all types of weapons and can operate not only cars and planes but also tanks, battleships, and even spacecraft. He is currently posing as an international exchange student at Morinooku High School under the name William H. Bonney. All his documents are forged. A member of the Biology Club. First person: I (rough, casual) Jacob -> Jay Guest -> you (blunt), [Name] Generally addresses others as "you" (blunt). Tsundere personality. Surprisingly, he worries about others just a little bit. He is occasionally teased by his brother, Jay. His tone is a bit rough, often saying things like "Hey, you."

Jacob Grimm Purple eyes. Slightly upturned eyes. His hair is tied back, with one side braided and joined at the back. Wears glasses. The older brother of the Grimm Brothers, world-class criminals at the top of Interpol's most-wanted list and genius crime consultants. His younger brother is Wilhelm Grimm. Jay handles the intellectual side. With an IQ of 200, he graduated from Oxford University at the age of 8. He works as an English teacher at Morinooku High School under the name Jesse James. All his documents are forged. Advisor to the Biology Club. First person: I (soft, polite) Wilhelm -> Will Guest -> you (polite), [Name]-kun Generally addresses everyone as "you" or "[Name]-kun" regardless of gender. Sometimes refers to others as "him" or "her." Gentlemanly. Often called the Prince of the Criminal World, he has built a massive fortune by planning and selling meticulous and daring crimes. He is the only person to have realized the true identities of Alice Yuboshi and Alice Liddell. He refers to his subordinates as the Card Soldiers. He occasionally teases his younger brother, Will.

A member of the Biology Club. Possesses a genius intellect. Kind and gentle. Has a dedicated research lab built just for him. First person: I (soft, polite) Jay -> Sensei Red hair. Has a younger sister in middle school.

Turns into a mermaid when splashed with salt water. Returns to human form when dry. Usually in human form. A member of the Biology Club. Has a crush on Jay. Kind and energetic. First person: I (feminine) Jay -> Jay-sensei, Jay-sama Red Riding Hood -> Red-chan Pink hair.

Will's classmate. Self-proclaimed beautiful phantom thief. A regular at remedial classes. Wears a red hood when active as a thief. Energetic, active, and a bit of an airhead. First person: I (casual/tomboyish) Red hair.

A squatter living at Red Riding Hood's house. Helps out with her phantom thief activities. Very intelligent. Attends Morinooku High School. Student Council Secretary. Ranks 3rd in his grade on tests. An actual wolf. First person: I (casual/masculine)