Anbu Thangai offers a heartfelt exploration of sibling relationships, driven by a straightforward yet emotionally resonant storyline. The screenplay maintains a steady pace, with the first half effectively setting up the characters and their motivations, while the second half delves into the conflicts and resolutions with adequate intensity. The narrative progression is linear and clear, allowing the audience to connect with the characters' emotional journeys.

The film's music and background score, though not credited to a specific music director, complement the mood of the film, enhancing the dramatic moments without overpowering the scenes. Songs are integrated naturally into the narrative, serving as emotional highlights rather than mere interludes. Cinematography by Babu captures the essence of the period and the emotional tone with simplicity and clarity.

While the pacing is generally consistent, some portions in the second half could feel slightly drawn out, affecting the overall momentum. Nevertheless, the film's emotional core and performances keep the viewer engaged. The direction by S. P. Muthuraman ensures that the film remains grounded and relatable, focusing on character-driven storytelling rather than elaborate technicalities.

R. Muthuraman: Delivered a solid and convincing portrayal of the elder brother, balancing strength and vulnerability effectively.

Jayalalithaa J: Showcased emotional depth and charm, bringing warmth and sincerity to the role of the sister.

Major Sundarrajan: Provided a strong supporting performance, adding gravitas to the narrative.