Domino in One Piece

Domino first appears when conducting a body search on Boa Hancock, during which Hancock uses her powers to temporarily petrify Domino to hide Monkey D. Luffy. After being turned back to normal, Domino accompanies Boa Hancock to Chief Magellan's office in Impel Down Level Four.

Later, Domino informs Chief Magellan about the upcoming transfer of Portgas D. Ace to Marineford and scolds him for taking too much time in the washroom.

During the timeskip, she is promoted to the position of Head Jailer of Impel Down after the previous Head Jailer defects to join the Blackbeard Pirates.

Domino is portrayed as a strict and serious person, known for her no-nonsense attitude and dedication to her duties. She takes her responsibilities seriously and doesn't tolerate any kind of negligence or misconduct, as evidenced by her scolding of Magellan for spending too much time in the washroom.

However, despite her strict demeanor, Domino, like many others, couldn't resist the enchanting beauty of Boa Hancock.

Domino is a slender woman with long, wavy blonde hair that partially covers her right eye, and she typically keeps her left eye concealed behind a pair of sunglasses. She wears a modified version of the Impel Down staff uniform, which consists of a short, pale brown double-breasted jacket that is worn almost like a dress over a white shirt with a black tie.

Her attire is completed with brown boots and long dark gloves that extend further up her arms compared to the standard staff gloves. She also sports the standard Impel Down hat on her head.

After the two-year timeskip, Domino undergoes a slight change in her appearance. She no longer wears the white shirt beneath her jacket, revealing more of her skin. Her hair becomes shorter, and she appears to have a white coat worn over her uniform.

As a child, Domino had a different appearance, with short hair and a hairstyle that still covered one of her eyes. She wore a light-colored sleeveless top paired with polka-dotted shorts and light-colored shoes.

As the current Head Jailer of Impel Down, Domino holds authority over the lower-ranking employees of the prison. While she is seen carrying a whip, her proficiency in using it is not well-documented, leaving her combat abilities uncertain.

Her primary role seems to be managing the prison and supervising its staff rather than engaging in direct combat.

• The name "Domino" is derived from the Latin word "dominus," which refers to a person who has control or authority over others.

• In the Impel Down Arc, Domino is the only high-ranked Impel Down officer who did not directly confront any of the escapees.