Bulbbul (chudail, as portrayed in the 2020 film)

Within the film's narrative, Bulbbul is a former child bride who endures severe abuse (including having her feet mutilated by Indranil and later being assaulted by Mahendra). Following these traumatic events and a near-death episode, the story depicts her transformation into the chudail-like avenger. The film frames this metamorphosis as both a personal empowerment and a supernatural response to gendered violence; the creative team represents the change symbolically (for example, with a blood-red moon) and links it to the support of the goddess Kali in its visual language. The sources are filmic and narrative — they present this as the film's internal origin rather than as an ethnographic origin myth.

In the film the killer is identified by the conventional folkloric marker of backward feet; this specific physical trait is repeatedly noted. The film also uses visual motifs during Bulbbul's transformations: a blood-red moon and scenes of the woman taking refuge in trees and being engulfed by flames during confrontations. The supplied sources do not document additional fixed facial, clothing, or canonical physical details beyond these filmic markers.

Portrayed in the film as able to physically attack and kill male perpetrators who abuse, murder, or exploit girls and women, the chudail-like force is an agent of targeted lethal vengeance. Villagers attribute several violent deaths to a chudail and respond in fear; within the narrative Bulbbul herself is shown carrying out killings (the plot states she kills Mahendra and other men are found dead and attributed to a chudail). The film visually frames these actions with the blood-red moon, which it signals as indicating the goddess Kali's support, situating the violence within a moral-symbolic register rather than providing a literal theological explanation.