Karthikeyan, born on April 21, 2004, hails from Chinthamani, Thenkasi, Tamil Nadu. His father, Ponraj, is a businessman, and his mother, Prema, manages their household. Karthikeyan has two siblings, an elder sister named Yogalakshmi and a younger brother named Sivabharathi. Starting his Kabaddi journey at the age of 15, Karthikeyan specializes as a Right Raider, known for his adeptness at the Hand Touch technique. Under the mentorship of Ravichandran, who previously played for the Alathankarai Club, Karthikeyan refines his skills at the Alathankarai ground. He admires Naveen from the Delhi Pro Kabaddi Team, particularly appreciating his bonus style. Despite his dedication to Kabaddi, Karthikeyan also enjoys playing cricket, although he describes himself as an average player in the sport. Having completed his BA in History in 2025, Karthikeyan aspires to secure a government job in the future. His career highlight includes a remarkable raid that led his team to victory in a state-level match. Described as a young player with ambitions to succeed in life through Kabaddi, Karthikeyan sees the sport as a pathway to achieving his goals.