Kisara is a strikingly beautiful, fair-skinned girl with violet eyes, long eyelashes, a mildly round nose, and thin lips, all contributing to her graceful appearance. Her hair is cut in the traditional Japanese princess style: choppy, straight, and dark brownish-green in color. It is slightly messier in the manga, but her hair still elegantly frames her face, covering most of her forehead, with strands falling to the sides of her cheeks and jawline. She has a long, thin neck, maintaining the oval shape of her eyes from her youth.

Her attire reflects both her elegance and youthful innocence. Kisara wears a small dress with a skirt that covers her thighs. The upper body of her dress is a fitted shirt with sleeves that cover her arms, while black thigh-high socks conceal her legs. As she matures into her teenage years, her appearance evolves, and she wears a schoolgirl-inspired outfit that includes a connected black dress designed to resemble a flower, with petals that slightly reveal her thighs. The edges of the skirt are accented with light blue, and the inner layers are a much lighter hue. Around her neck is a kerchief that drapes down to her shoulders, with a light double-edge design. The sleeves of the dress cover her arms, and the collar of the shirt is loosely tied below her chest. Her overall look is completed with black thigh-high socks and high shoes, adding a touch of sophistication to her appearance.

Kisara is a complex character, showing both a professional and serious side when it comes to her work as the president of her company and a much darker, more malicious side in her personal vendettas. While at work, she is extremely disciplined and demands respect from her employees, even insisting that they refer to her as “president” rather than using her first name, even if they are familiar with her outside of the workplace. This strictness sometimes leads to frustration from those around her, especially when her desire to correct others or pry into their actions causes tension, sometimes even making people storm out of her presence. Despite this, Kisara takes her responsibilities seriously and is known for maintaining composure in front of larger groups, commenting on matters with sharp insight, while also mischievously badmouthing Rentaro’s abilities.

Kisara’s more personal side reveals her deep hatred and desire for vengeance against her grandfather and the Tendo family. She targets them relentlessly, driven by the trauma of her parents’ deaths. Her deep-seated anger is reflected in her pursuit of revenge, something she shares with Rentaro. In a shocking moment, Kisara reveals the full extent of her malice when she nonchalantly tells Rentaro how she killed her older brother, cutting him in half without remorse. This revelation shows a sadistic and cruel aspect of her character, as she smiles while describing the act. She also confesses to Rentaro that she believes in the concept of absolute evil, feeling that justice is incapable of touching it. Despite her cruelty, a brief tear betrays her emotional turmoil, though Rentaro and the others remain oblivious to the weight of her words, staring at Kisara in stunned silence.

Kisara runs the Civil Security Corporation, which she uses to combat Gastrea and uphold her sense of justice. Her leadership skills and personal drive make her a respected figure among her employees, including Rentaro and Enju.

Kisara is highly skilled in swordsmanship, using her family’s techniques to fight Gastrea and protect her allies. Despite her physical limitations due to a kidney condition, her determination and skill allow her to remain a formidable combatant.

A central element of Kisara’s character is her vendetta against the corrupt Tendo family. Her hatred for her family’s unethical practices drives her actions and creates internal conflicts, as she struggles to balance her pursuit of justice with her growing ruthlessness.

• Rentaro Satomi
  Kisara shares a long-standing relationship with Rentaro, having grown up together. She acts as his boss but also harbors romantic feelings for him, though she struggles to express them openly. Their relationship is a mix of mutual respect, trust, and occasional friction due to their differing approaches to justice.

• Enju Aihara
  While Kisara respects Enju as Rentaro’s partner, she often finds herself teased by the young Initiator, adding lighthearted moments to their interactions.

• Tendo Family
  Kisara’s relationship with her family is defined by anger and betrayal. Her deep resentment for their corruption drives much of her motivation and shapes her worldview.

Kisara Tendo’s role as a leader, fighter, and avenger makes her one of the most compelling characters in Black Bullet. Her struggle to reconcile her ideals with her personal vendetta highlights themes of justice, morality, and the cost of revenge. Kisara’s layered personality and dynamic relationships with Rentaro and her family leave a lasting impact on the series and its fans.