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Reuniting with Dhanush and Selvaraghavan, Sonia played a different archetype in the gangster saga Pudhupettai . Here, the romance was grittier. She played a call girl with a heart of gold, adding layers of maturity to her on-screen persona. The love triangle and the eventual demise of her character added to the film's gritty narrative.
Sonia Agarwal’s filmography is a masterclass in the "intense romance" genre. Her characters often dealt with unrequited love, obsession, and deep sacrifice. 1. 7G Rainbow Colony (2004)
Sonia’s most significant and public relationship was with director , brother of actor Dhanush. He discovered her and launched her in Thulluvadho Ilamai (2002), though her role was small. He then directed her in April Madhathil and Kaadhal Kondein , crafting her most memorable roles. Their personal and professional lives were deeply intertwined.