Donquixote Rosinante who is also known as Corazon was part of the Donquixote Family and the brother of Doflamingo. Rosinante was the kinder of the brothers who learnt that he needed to stay close to Doflamingo in order to document and report every move to the Marine Commander. He was executed by Doflamingo around 13 years ago, but Trafalgar never forgot what he did for him.
This fantastic artwork of Rosinante was done by AjkaSketch who has a bunch of awesome looking artwork based on many other anime, I think my favourites are their One Punch Mans. Anyways, if you like this be sure to check them out, otherwise go ahead and share this fantastic artwork with other fans.