Nool Veli showcases K. Balachander's signature storytelling style, blending intense character-driven drama with social commentary. The screenplay is tightly woven, maintaining a steady pace that allows the audience to engage deeply with the characters' emotional journeys. The first half effectively sets up the conflicts and relationships, while the second half intensifies the drama, leading to a poignant climax.

The film's music by M. S. Viswanathan complements the narrative beautifully, with songs that enhance the emotional tone without overpowering the story. The background score subtly underscores the tension and mood shifts, adding depth to key scenes. Cinematography by B. S. Lokanath captures the nuanced performances and the film's somber atmosphere with finesse.

Overall, Nool Veli stands out for its mature handling of complex themes, strong performances, and a balanced blend of narrative and musical elements, making it a memorable piece in Tamil cinema of the late 1970s.

Sarath Babu: Delivered a nuanced and restrained performance, effectively portraying internal conflict.

Sujatha: Brought depth and emotional intensity to her role, anchoring the film's dramatic core.

Saritha: Provided a compelling and heartfelt portrayal, adding layers to the interpersonal dynamics.

Kamal Haasan: Showcased versatility with a subtle yet impactful performance in a supporting role.

J.V. Ramana Murthi: Delivered a solid performance, contributing to the film's narrative strength.