a bona fide killer kdrama cast: Roles & Character Guide

The a bona fide killer kdrama cast brings together established Korean performers and younger supporting actors for a South Korean slice-of-life action drama. The series follows Yoo Bo-na, a married mother who hides a dangerous life as the vigilante “Kingfisher.” Her husband, Kwon Tae-seong, investigates the secret surrounding her double life, while detective Lee Dong-jin also works toward uncovering her identity.

The drama is based on the Kakao Webtoon A Bona Fide Killer by Yoon and Gum. Kim Eun-hee is credited as the writer, while Yoon Jong-ho and Kim Ji-hoon direct the television adaptation. Bon Factory, Baram Pictures, and Studio PIM are listed as the production companies.

Video Highlights:

• Gong Hyo-jin is presented as the lead performer in the age-focused cast discussion.
• The featured cast spans several generations of Korean acting talent.
• The discussion highlights the reported eight-year difference between the two lead performers.
• Supporting actors add specialist roles involving investigation, hacking, weapons, and poisons.

The central trio gives the drama its main emotional and investigative structure. Gong Hyo-jin plays Yoo Bo-na, the ordinary working mother concealing her identity as Kingfisher. Jung Joon-won plays Kwon Tae-seong, Bo-na’s husband and an investigative journalist determined to understand the truth behind her secret life.

Lee Sang-yi plays Lee Dong-jin, a detective whose investigation overlaps with Tae-seong’s search. This creates a three-way tension between family, journalism, and law enforcement. The characters are connected by the same mystery, but each approaches it from a different position.

The lead performances are especially important because the drama depends on believable relationships rather than a single action storyline. Bo-na must appear convincing in family and workplace settings while retaining the discipline associated with her former or current assassin identity. Tae-seong’s role adds personal stakes, and Dong-jin supplies the investigative pressure.

A supplied cast-age discussion identifies Gong Hyo-jin, Jung Jin-woong, Lee Sang-yi, Sung Dong-il, Mu Jin-sung, Ha Yul-ri, and Choi Woo-sung. However, the series cast listing identifies Jung Joon-won as Kwon Tae-seong. Because the two names differ, readers should treat the age discussion as supplementary rather than as the definitive cast-credit record.

Durumi Electronics Sales Team 3 connects Bo-na to a group of coworkers with specialized skills. The workplace setting supports the series’ contrast between an ordinary professional environment and the concealed operations surrounding Kingfisher.

Sung Dong-il’s Kim Bong-pal is the most important figure in this group for Bo-na’s secret life. The character is described as a former professional assassin specializing in “sudden death.” After retiring, Bong-pal opens a flower shop near Bo-na’s home. The shop’s basement functions as Bo-na’s secret training ground, making the location a practical and personal link between her public and hidden identities.

The group’s specialties suggest that Bo-na’s missions are not built around one skill alone. Investigation, weapons, digital access, poisons, and administrative support all occupy different parts of the team’s structure. This also gives the ensemble a clear identity beyond its workplace label.

Mu Jin-sung’s Ki Young-do is positioned as the team’s hacker, while Ha Yul-ri’s Oh Hyun-nam represents a newer employee entering a more experienced environment. Their presence creates a generational contrast with veteran performers such as Sung Dong-il and Seo Jeong-yeon.

Relationship Map

The Nambu Police Station characters expand the consequences of Bo-na’s secret identity. Choi Woo-sung plays Beom Seong-hoon, a member of Criminal Investigation Division Violent Crimes Team 2 and a friend of Se-ah. His police connection gives the drama another route toward the truth.

The wider supporting cast also links the central mystery to Tae-seong’s family and professional circle. Cha Mi-kyung plays Ok Seon-ja, Tae-seong’s mother and Bo-na’s mother-in-law. Lee Eun-saem plays Kwon Se-ah, Tae-seong’s youngest sister, while Lee Sun-hee and Kim Yun-jeong portray his older sisters.

The family roles are important because Bo-na’s challenge is not limited to hiding from investigators. She must also maintain the appearance of a normal family life. Her daughter, Kwon Yul, makes the domestic side of the story especially significant, while Tae-seong’s sisters and mother create additional relationships that can complicate Bo-na’s decisions.

The professional supporting characters reinforce the investigative tone. Gu Hae-na is a new reporter and Tae-seong’s junior, while Na Guk-jin is identified as a director. These characters help broaden the world around Tae-seong’s journalism and the police investigation.

A Bona Fide Killer premiered on MBC TV on July 31, 2026, and is scheduled to air every Friday and Saturday at 21:50 KST. The supplied series information lists two episodes at the time of the current reference update, with additional episodes scheduled through September 12, 2026.

The available ratings table records a nationwide audience share of 7.4% for Episode 1 on July 31 and 8.0% for Episode 2 on August 1. Seoul audience shares were listed as 6.8% and 7.9%, respectively. Later episode figures were not yet provided in the referenced data.

For the latest character credits, consult the A Bona Fide Killer cast and character listing. The page identifies the principal performers, the Durumi Electronics Sales Team 3 ensemble, and the Nambu Police Station supporting cast.

The production information also credits Park Sung-il with the music. Executive producer Lee Min-ji is listed alongside producers Jeong Gu-yeong, Park Ji-eun, and Jeong Ji-min. Principal photography began in December 2025, while MBC included the drama in its 2026 programming slate.

The a bona fide killer kdrama cast is structured around the contrast between a hidden assassin life and the routines of family, work, journalism, and police investigation. Gong Hyo-jin anchors that contrast as Yoo Bo-na, while Jung Joon-won and Lee Sang-yi provide the two strongest routes toward discovery.

The supporting ensemble gives the story additional depth through distinct professional specialties and family relationships. As the 2026 broadcast continues, the most useful way to follow the cast is to keep each character’s group and relationship to Bo-na clearly organized.