Jack Sparrow is based on Keith Richards.
 This is mainly shown by his increasingly erratic behaviour and Jack's hallucinations, which appeared to be simply his deranged mind in the beginning where dozens of "Jack Sparrows" appeared to crew the ship in his solitary exile, but later the hallucinations grew more important and there were mainly two "Jacks" constantly arguing about which path to follow: the immortality or the mortality
 Sparrow has numerous tattoos, and has been branded a pirate on his right arm by Cutler Beckett, underneath a tattoo of a sparrow

