Tricia Chandler is the daughter of Geraldine Chandler and the granddaughter of Chas Chandler.
She appears as a young pre-adolescent girl, but first met John Constantine as a baby, to which the latter magician warned the Chandler family not to name her after Chas' mother. She was one of the major characters of the All His Engines graphic novel, where Chas and John attempts to save her from a coma brought by a demonic epidemic. They succeed, and Tricia and John developed a friendly relationship with each other.