Rosinante 'Corazon' Donquixote

Donquixote Rosinante, or Corazon, was formerly a World Noble of the Donquixote Family descent, being the second son of Donquixote Homing and the younger brother of Donquixote Doflamingo. After his family lost their status as Celestial Dragons and became pariahs, Rosinante was discovered by Sengoku and enlisted into the Marines, eventually reaching the rank of Commander. Upon reuniting with Doflamingo, he feigned muteness and operated as an Elite Officer of the Donquixote Pirates, serving Doflamingo under the codename Corazon while remaining an undercover Marine.

Rosinante abandoned his post in an attempt to cure Trafalgar Law of his Amber Lead Syndrome. He eventually obtained the Ope Ope no Mi, forcing Law to eat it and thus giving him the means to save himself from the disease. However, his cover was blown by the former Corazon, Vergo, and he was subsequently executed by Doflamingo. Rosinante's kindness and sacrifice would serve as driving motivators for Law to one day avenge him by taking Doflamingo down.

Rosinante was a tall man (standing just below his brother at 293 cm); in adulthood, he was a comparable height to his older brother Doflamingo (who stands 305 cm). He had short shaggy golden-blonde hair, pale skin (tanner in the manga, much like his brother), and sharp, reddish-brown eyes. He wore a dark red hood from which two heart-like shapes hang, a pair of beige jeans (white in the anime), a very dark-purple feather mantle much like his brother, and a white shirt with pink hearts printed all over it. He also wore mismatched shoes. His hair was styled longer than his brother's, as it came close to his eyes. Rosinante has dark red lipstick lips reaching his mouth to his cheeks in lines—over his right eye was a dark blue heavy eight pointed rectilinear star tattoo. He also wore sunglasses, though he did away with these upon his 6-months journey with Law.

During his childhood, Rosinante had his hair in an unkempt fashion, covering his eyes. Prior to leaving Mary Geoise, he wore the typical garb of the Celestial Dragons, and had his hair in the same style as his older compatriots. After leaving, his hairstyle changed and his wardrobe consisted of simple yet fine clothes with a frilled cravat that became very ragged due to the uneasy lifestyle he had to endure. Suffering from torture at the hands of the locals who hated the Celestial Dragons, as well as other battles, left scars and stitches all over his body. Upon joining the Marines, Rosinante wore the standard cadet uniform, minus the makeup/tattoos he had when working as a spy.

When Trafalgar Law first met with Rosinante, Rosinante was noted for hating kids, especially when Baby 5 and Buffalo played practical jokes on him, such as making him slip upon passing through the doorway or giving him scalding tea that burned his tongue, resulting in his abusive behavior towards them. In fact, the first thing that Rosinante did to Law was to grab him and throw him out the window. This was actually part of an act, however, as it was his duty as a Marine to dissuade children from joining the crew, which he failed with Baby 5, Buffalo, Dellinger and Law.

Despite his outward behavior of a violent man who dislikes children, he genuinely inherited his father's kindness (something Doflamingo himself admits) believing that his elder brother is a monster born evil and only acted cruel to children in the hopes of driving them away from following Doflamingo. He cared deeply for his birth family as he wept for his mother's death and cried when his brother was shot with an arrow. From his kindness, he did not possess any manners of a typical Celestial Dragon, and saw it his duty to stop his brother's madness, a sense of justice that led him to join the Marines as an undercover spy. Because of this, Rosinante was shown to be forgiving since he did not hold any grudge against Law for stabbing him in the back and even kept quiet about his transgression. When Law revealed his true name, he showed genuine concern and worry, even warning him about the danger that he was in. He was capable of compassion as he went as far as to go out of his way with both his brother and the Marines to take Law throughout the North Blue to find a doctor to cure the boy's disease and flew into violent rages whenever the doctors caved into prejudice due to their incorrect belief that Law was a walking contagious disease who should not have survived the extermination of Flevance. In spite of his extreme methods, due to his empathy and courage, he appears to follow his own ideals instead of adhering to the Marines' doctrine of Absolute Justice.

He was believed to be incapable of speech due to a prior accident and, according to Diamante, was unintelligent and cannot concentrate. However, this was merely a façade and he was fully capable of speaking, as well as being perfectly intelligent, as seen by his playing on how the others perceive him. Upon hearing Law's full name, knowing the importance of the initial "D.", he was forced to break his silence, showing more perception than what his comrades believed.

Although his mutism and dislike for children were mere acts to hide his true self, the one attribute that was genuine was his clumsiness, easily falling for Baby 5 and Buffalo's pranks and constantly tripping himself. He was also seen smoking, though due to his clumsiness, he accidentally set his own cowl aflame every time he tried to light a cigarette.