Damian Wayne is a superhero appearing in American comic books published by DC Comics, created by Grant Morrison and Andy Kubert, commonly in association with Batman. Damian Wayne is the biological son of Bruce Wayne/Batman. His mother is Batman's love interest Talia al Ghul, and his grandfather is the Batman villain Ra's al Ghul. With the al Ghuls citing Bruce Wayne as the optimal successor to their empire, after faking a miscarriage to his father and calling off their marriage, Talia has kept his existence hidden from Batman until Batman #656 (2006). In turn, the character is revealed to have originally been intended to "kill and replace his famous father," as well as serving as a host body for Ra's al Ghul, thus, in theory, unifying the Wayne and Demon factions as intended by the al Ghuls. Damian is Bruce's youngest and only biological child in mainline DC continuity, with him having four older adopted siblings: Dick Grayson, Jason Todd, Tim Drake, and Cassandra Cain.

A prototype of the character originally appeared as an unnamed infant in the 1987 story Batman: Son of the Demon, which at the time was not considered canon. Following this, various alternate universe stories dealt with the character's life, giving him various names. In 2006, the character was reinterpreted as Damian Wayne by Grant Morrison, and introduced into the main continuity in Batman #655, the first issue of the "Batman and Son" story arc. Damian Wayne is the fifth character to assume the role of Robin, Batman's vigilante partner.

Damian, as a preadolescent, was left by his mother in the care of his father, who had been unaware of his existence. He is violent, self-important, and was trained by the League of Assassins, learning to kill at a young age, which troubles the relationship with his father who refuses to kill. However, the Dark Knight does care for his lost progeny. After the events of Batman R.I.P. and Batman: Battle for the Cowl, he takes the role of Robin at ten years of age, thereby becoming the fifth person to use the Robin persona. He first worked with Dick Grayson before going to work alongside his father, upon the original's return to the role of Batman.

(Source: Wikipedia)