He rose to prominence for his ability to entertain crowds with his mimicry performances by enacting vocal variations of several high-profile celebrities in television reality shows and in social media platforms.
[2] His father Sivagangai Sethurajan notably imitated the voice of former Tamil Nadu chief minister C. N. Annadurai (popularly known as Perarignar Anna) for a film portion sequence in Iyakkunar Sigaram K. Balachander's directorial venture Iru Kodugal (1969).
[2] It was revealed that his father apparently received a perch of land as a goodwill gesture and as a gift to build a house at Chennai, in recognition of his work contributing to the growth and success of AIADMK party during the latter stages of his lifetime.
[7][8] Sethu made his film acting debut in Ilaya Ragam (1995) where he played in a minor role featuring as a close friend of veteran actor Vivek.
[9] He was roped in by filmmaker Chakri Toleti to give voiceover by reprising and imitating the voice of the then chief minister of Tamil Nadu M. Karunanidhi in a film portion sequence of Kamal Haasan starrer Unnaipol Oruvan (2009).