AppearanceMr. 1 is a man with long thin limbs and fingers. His head is shaven and he has the archaic Japanese symbol of the number "1" (壱) tattooed on his torso.
In Impel Down, like most prisoners, he wore striped prisoner clothing. He also has a scar to the right of his right eye. During his break-out of his cell, he was bare-chested, with his shirt tied around his waist.
PersonalityMr. 1 is stern, emotionless and confident. Similar to Crocodile, Mr. 1 hates weakness and due to his Devil Fruit abilities, has come to think of himself as undefeatable. He is serious at all times and does not tolerate weakness or frivolity which is a sharp contrast to the flamboyant Mr. 2 Bon Kurei. Mr. 1 also seems to have some views similar to Crocodile's, such as the notion that having friendships makes one weak. In battle, he is utterly merciless, such as hitting Zoro while the pirate was wounded and unable to defend. Nevertheless, Mr. 1 has some sense of honor, as he accepted his defeat at Zoro's hands.
While Mr. 1 is generally a cold-hearted person, he secretly had a childish dream of becoming a Super Hero. When Miss Goldenweek materialized this dream, while his face showed great discomfort, he was actually quite delighted in secret.
While in Impel Down Level 4, where he was placed into intense labor in a high temperature environment, he simply pushed a runaway prisoner, who knocked him in the head, into a boiling blood pot, proving his indifference even when being in "Hell".
RelationshipsMuch like his boss, Crocodile, Mr. 1 generally views allies as hindrances rather than assets. His relationship with Miss Doublefinger is a professional partnership, with both of them working together to meet any task set before them. While Mr. 1 generally has mostly the same type of indifferent professional relationship with the most of the Baroque Works Agents, he however is on bad terms with Mr. 2 Bon Kurei. Because Mr. 2's flamboyant nature conflicts with his static cold heartedness, the two of them would often fight with each other, a lot like their later opponents, Zoro (who has beaten Mr. 1) and Sanji (who has beaten Mr. 2). Ever since first meeting each other in Spiders Cafe, they've had this type of rivalry relationship, even in Impel Down's breakout.
Nevertheless, Mr. 1 seems to have some level of loyalty towards Crocodile, as when most of their colleagues left prison, Mr. 1 stayed behind with his boss and awaited transfer to Impel Down. He then later joined the riot in Impel Down stating it was because Crocodile asked.
Abilities and PowersFormerly an assassin from West Blue, Mr. 1 is a proficient hand to hand martial artist. Even without his Devil Fruit powers, he still proves to be a dangerous man, as seen when he simply gave a headbutt to a fellow prisoner (who was larger than him) was enough to knock the man over a great distance. Mr. 1 was also most likely wearing seastone shackles at the time, and was punched by the prisoner hard in the head, but simply shrugged the pain off before retaliating. His power was great enough to put him in Level 4 of Impel Down, and the intense heat there seemed to have very little to no effect on him.
In fact, his reputation was great enough to be recognized by one of the Marine officers during Impel Down's breakout attack. He is also strong enough to defeat many Whitebeard Pirates members and their allies from the New World. His strength has earned Crocodile's respect, something that most Baroque Works members, even Crocodile's right hand woman, Nico Robin, did not get. Crocodile went out of his way to free Mr. 1 from his cell to assist him in the upcoming war.
Devil FruitBy combining his martial arts prowess with the Supa Supa no Mi, a Devil Fruit which gives him the ability to turn any part of his body into sharp steel blades, Daz Bones is a fighter that can literally become a living weapon. As well as giving him an endless variety of bladed weapons, his Devil Fruit powers make him almost immune to damage, by turning his entire body into a blade, thus making it as hard as steel. He is also able to create a small but powerful tornado, similar to Zoro's Tatsumaki technique.
Pre-Baroque WorksBefore joining with Baroque Works, Mr. 1 was an infamous assassin from West Blue by the name of Daz Bones and was wanted by the Marines and known as a deadly warrior.
Operation UtopiaAfter joining and working for Baroque Works for an unspecified amount of time, Mr. 1 was called to assemble with the other Officer Agents for the fulfillment of Baroque Works' ultimate goal, Operation Utopia. Arriving at Spiders Cafe in Arabasta, the designated meeting place, Mr. 1 came across a bunch of suspicious guys dancing outside. Beating and throwing them into the cafe, he learned that they were Mr. 2 Bon Kurei's subordinates. Despite leaving them barely alive, this action caused a brief scuffle between him and Mr. 2. Before it could get out of hand, Mr. 1's partner, Miss Doublefinger, stop them so that they could meet their mysterious boss, Mr. 0, in Rainbase.
Mr. 1 and his fellow Officer Agents burning their orders in order to keep secret ceremoniously.
After being transported to Rainbase by Banchi, Mr. 1 and his fellow Officer Agents were led to a room that was submerged underwater. There they were greeted by Miss All Sunday, who revealed to them not only that they were under the casino of Rain Diners, but also the identity of their boss, the Shichibukai Crocodile. After a brief of this revelation, Mr. 1 and his fellow agents were informed of the goal of their final plan and their roles to achieve it. Just as they were finishing up the meeting, a new complication however arose before Mr. 1 and his fellow agents. Mr. 3, a fellow agent who snuck into the meeting, revealed to them that he had failed in his mission to assassinate Vivi and her pirate companions. With this new information and some faces provided by Mr. 2 who happened to met the pirates in question, Mr. 1 and his fellow agents were ordered by Crocodile to be on the look out for Vivi and the pirates. As Vivi was a friend of the leader of the rebellion that was happening in Arabasta, Kohza, her meeting with could spell the ruin for Operation Utopia. With this final order, Mr. 1 and his fellow agents went to fulfill their parts in their final mission.
As the mission commenced in Nanohana, Mr. 1 and his partner took over a gigantic weapons ship and crashed it into the port town. With the damage caused by the ship and the farce perpetuated by Mr. 2 masquerading as the the king of Arabasta, Nefertari Cobra, at the same time, Mr. 1 and his fellow agents had set off a series of events that would provoke the rebels into fighting against the king and his army. As Mr. 1 and Miss Doublefinger were leaving, they found a little boy, Kappa, had discovered the truth behind Mr. 2's trick. Seeing the potential danger, they messed the boy up so he won't ruin the mission before leaving with Mr. 2 to Alubarna, the capital of Arabasta.
Mr. 1 and Miss Doublefinger face off against Zoro and Nami respectively.
Regrouping with the rest of the Officer Agents at the westernmost gate of the city, Mr. 1 and his fellow agents were told to wait there for Vivi and her pirate companions who they learned would be coming. Soon enough, they saw the princess and her companions arriving on Spot-Billed Ducks. To their surprise, Mr. 1 and his fellow agents noticed there were six cloaked figures heading toward them, all wearing the same type of cloak. Since the six cloaked figures were all riding Spot-Billed Ducks, the quickest animal in Arabasta, Mr. 1 and his fellow agents unfortunately couldn't catch the group as it split up and passed them heading to one of the five city gates. Not knowing which one of the was Vivi, Mr. 1 and his fellow agents split up as well to catch the cloaked figures. Following two cloaked figures who passed through the westernmost gate with his partner, Mr. 1 caught up with them. However much to his and his partner's surprise, not one of the two they followed was Vivi. Instead they were Zoro and Nami.
Mr. 1 defeated by Zoro.
Seeing that Nami was the weaker of the two, Mr. 1 and his partner decided to get rid of her first. However in the midst of an attack against her, Mr. 1's attack was blocked by Zoro. Recognizing the pirate as the one defeated 100 Millions who worked at Whiskey Peak and the one who killed the previous Mr. 7, Mr. 1 soon got into a battle with the Pirate Hunter while his partner went off to battle Nami. Having a body as hard as metal thanks to his Devil Fruit powers, Mr. 1 was able to withstand against all of Zoro's attacks. Despite this, Mr. 1's opponent was able to withstand his attacks as well. As the battle continued, Mr. 1 attacked Zoro more brutally with each attack. Much to Mr. 1's surprise, no matter what he did, his opponent wouldn't fall down regardless of the wounds Mr. 1 inflicted on him. In the apex of the battle with his opponent completely covered with blood and wounds, Mr. 1 decided to finish Zoro once and for all. However at that very moment, his opponent was finally able to slash through Mr. 1's metal body.
Completely wounded from the slash, Mr. 1 admitted his defeat and fell unconscious. After Operation Utopia failed with Luffy beating Crocodile, Mr. 1 was found and arrested by the Marines. He along with the other arrested Baroque Works agents were then sent to prison.
 Miss Goldenweek's "Operation: Meet Baroque Works"
After being arrested, Mr. 1, along with Crocodile and the other arrested Officer Agents, were imprisoned in a Marine base. There, he, Crocodile, and Mr. 4 established themselves as the strongest amongst the male prisoners there. As time passed, they were soon visited by the most unexpected of visitors, Miss Goldenweek and the Mr. 5 team. With a mission to free their imprisoned colleagues, Miss Goldenweek and her group infiltrated the Marine base and freed Mr. 1 and the rest from their cells. Though he was offered freedom, Mr. 1 along with Crocodile, decided to voluntarily stay behind in their cell.
As they remained in the ruins that they fellow agents made for their escape, Mr. 1 and Crocodile were affected by a hypnotic technique of Miss Goldenweek that materialized their deepest dreams. Though Crocodile was annoyed by this, Mr. 1 on the other hand, was secretly delighted that his past dream of becoming a "Super Hero" was materialized. Continuing to refuse freedom, they were soon greeted by Mr. 2 and Mr. 3 who were both just captured by Captain Hina. Together, the four Baroque Works members were sent to Impel Down.
Escape from the Great GaolMr. 1 was incarcerated in the Level 4 "Blazing Hell" of Impel Down, seen carrying a huge piece of wood for the fire pit. He seemed unfazed by the immense heat and labor being put through, a testament of his power. He also headbutted a prisoner who tried to push him aside to run away into the boiling blood pot, much to the annoyance of the guards. He also noticed the attempt that Luffy was making to reach level 5.
When Crocodile was freed and escaped from Level 6 along with Luffy, Ivankov, Inazuma and Jinbei, he offered to free Mr. 1 to provide him some backup and he agreed. Later, he joined the main force alongside Luffy and Mr. 2 Bon Kurei. As Blackbeard caused the leaders of this main force to stop, Magellan was able to follow them once taking out Blackbeard's crew with not much effort. Although Iva and Inazuma tried to stop Magellan, he still overcame them and as soon as Mr. 1, along with the other rioters, joined with Buggy's forces, Magellan attacked them. Fortunately, they were saved by Mr. 3's wax abilities.
Mr. 1, Buggy, and Crocodile all ride on the makeshift raft, carried by Jinbei.
As Luffy decided to take on Magellan with Mr. 3's abilities, Mr. 1, Crocodile, Jinbei, Mr. 2, Buggy and the other rioters made their way to the main entrance in order to get a ship. Although they expected Marine ships to attack them, instead they were sailing away. As it seemed to be too late to get a ship, Mr. 1, Crocodile and Buggy were easily able to get onto one of the marine ships with the help of Jinbei's fishman abilities. He and Crocodile alone managed to defeat all the Marines on the battleship. He then mocks Buggy for being completely useless during the battle.
Chasing AceOnce everyone manages to board the ship, the Marines call it and reveal that Buggy was a part of the Pirate King's crew. Mr. 1 asks him why he is so weak if all that is true. He was last seen alongside with the other Impel Down fugitives, falling from the sky to Marineford, to support Crocodile and (maybe) to help Luffy in Ace's rescue. He is seen alongside Crocodile fighting the Whitebeard Pirates.
Major Battles* Mr. 1 vs. Mr. 2 Bon Kurei
* Mr. 1 vs. Zoro
* Mr 1, Mr. 2, Crocodile, Jinbei, Luffy, Emporio Ivankov, Inazuma, residents of New Kama Land and prisoners of Impel Down vs. Impel Down Guards (level 4)
* Mr 1 and Mr. 2 Bon Kurei vs. Impel Down Guards (level 1)
* Mr 1, Crocodile, Jinbei and Buggy vs. Marines (Outside Impel Down)