Which Batman sidekick is the son of Talia al Ghul?

The answer is Damian Wayne because he is the biological son of Batman and Talia al Ghul. Talia al Ghul is the daughter of Ra's al Ghul, one of Batman's greatest enemies. Damian was raised by Talia and trained from a young age to become an assassin, but later joins forces with Batman and becomes his sidekick, adopting the Robin mantle. Damian Wayne is known for his deadly martial arts skills and conflicted upbringing, making him a complex and intriguing character in the Batman universe.