Thirunaal offers a conventional storyline that blends action and drama with emotional elements, but it struggles to maintain a consistent tone throughout. The screenplay is straightforward, with predictable plot points that may not surprise seasoned viewers. The pacing in the first half is relatively steady, establishing characters and their motivations, but the second half tends to drag with prolonged sequences that dilute the narrative momentum.

The film's music by Srikanth Deva is serviceable, with a few songs that fit the mood but fail to leave a lasting impact. The background score complements the emotional scenes adequately but lacks the punch expected in action sequences. Cinematography by Mahesh Muthuswamy captures the rural and urban settings well, adding visual appeal to the film.

Overall, while the performances by the lead actors add some weight to the film, the lack of novelty in the story and uneven screenplay hinder Thirunaal from standing out in its genre. The film caters primarily to fans of Jiiva and Nayanthara but may not engage a broader audience looking for a fresh cinematic experience.

Jiiva: Delivers a sincere and earnest portrayal of the protagonist, effectively conveying emotional depth despite the script limitations.

Nayanthara: Offers a strong presence with a restrained performance, adding charm and emotional support to the narrative.

Meenakshi: Provides a competent supporting role with limited scope.

Sharath Lohitashwa: Adequately portrays the antagonist with intensity.