Domino is a lovely but domineering guard of the great prison Impel Down. Always wears her shades.
Domino is a supporting character in the One Piece series that was created by Eiichiro Oda. The series first began serialization in Shueisha's Weekly Shōnen Jump on August 4, 1997. She would later appear in the Impel Down Arc that began in Volume 54.
Her first appearance was in One Piece Volume 54 CH. 526 "Adventure in the Great Prison", and her first anime appearance was in One Piece - Episode 422 "A Deadly Infiltration! The Underwater Prison Impel Down". Her character in the Japanese series is voiced by Naomi Shindou, and the U.S. dub produced by FUNimation has yet to announce a voice actress.
When Boa Hancock arrived to see the prisoner Portgas D. Ace, before his execution at Marineford, Domino was her official guide. She was in charge of Hancock's body check for weapons, but was caught off guard by by her Love-Love Devil Fruit powers and changed to stone. This was to avoid Domino from finding that she had allowed the pirate Monkey D. Luffy to infiltrate the prison. Domino later check Hancock after she was unfrozen, and place the Sea Prism Stone cuffs on the pirate empress. From there they went to see chief-warden Magellan, then down to see Ace on Level 6. After she had her talk with Ace, Domino saw Boa Hancock off.
Three hours before Ace was to be turned over for his execution, Domino was outside Magellan's washroom for spending far too much time inside his washroom. She scolded him for threatening the spotless reputation of the prison if they were late. Though Ace's brother, Luffy, had been spotted captured, Ace was handed over the the Marine guard without incident.
The pirate Luffy started a massive breakout with many other prisoners, and Domino assisted Magellan in trying to get the incident under order. The pirates were able to escape Impel Down and the Calm Belt. Magellan was later seriously injured by the Shichibukai, Blackbeard; and the prisoners he had released from Level 6.
In the time between the break out and two years later, Domino was promoted to the Chief Guard at Impel Down as Hannyabal as promoted to warden in place of the injured Magellan.
Domino became the chief guard of Impel Down during the timeskip (see the splash page of Ch. 661).