OVA
Description
Izumi Shimomura is a character from the Ajin series, originally introduced under the birth name Yōko Tainaka. She is a young woman of short stature, standing at 155 centimeters, with short black hair that was once long during her school years, and she has a small beauty mark under her left eye. Her eye color differs between adaptations, appearing grey in the original manga and red in the anime. As an Ajin, she possesses the defining traits of her kind: complete immortality and the ability to regenerate from any wound, including death, as well as the power to manifest a visible entity known as a Black Ghost from Invisible Black Matter.
Her outward personality is stoic, quiet, and intensely reserved. She typically speaks only when necessary, delivering information in short, direct sentences, especially when reporting to her employer. Despite this serious and professional demeanor, she is not devoid of emotion and can become easily embarrassed in personal situations, such as when her casual clothing is commented upon or when she inadvertently says too much to someone during an interrogation. Her intelligence and capacity for understanding are notable, allowing her to assess situations and people, including Kei Nagai's younger sister, with a level of perception that is crucial to her role.
The reserved nature she displays is a direct result of a deeply traumatic past. As Yōko Tainaka, she lived in poverty with her mother and abusive stepfather. After a painful personal betrayal, she attempted to take her own life, an act that led to a violent confrontation with her stepfather, resulting in her death and subsequent resurrection, which revealed her nature as an Ajin. Believing her mother had conspired to sell her to the government, she fled and lived a desperate life on the streets. It was during this period that her Black Ghost first appeared to her in her loneliness. Eventually, she was tracked down in a hospital by the government agent Yū Tosaki. He revealed the truth that her mother had in fact died trying to protect her from her stepfather's scheme. Confronted with this reality and the revelation that her parents were both dead, she died of her illness and revived before Tosaki, confirming her status. To escape her past, she entered a special contract with him, taking a new identity. Her chosen name, Izumi Shimomura, honors her mother's maiden name and her biological father's surname, symbolizing her decision to move forward while carrying the memory of her family.
Her primary role in the story is that of the personal bodyguard and assistant to Yū Tosaki, who works for the Ministry of Health, Labour and Welfare. Her duty is to protect him from the various threats that arise in their pursuit of other Ajin. Her relationship with Tosaki is the central pillar of her new life. It is a complex professional bond built on mutual dependence. He relies heavily on her abilities for protection and field operations, holding the secret of her identity as leverage to ensure her service. For her part, she understands his methods and is intensely loyal, grateful to him for providing her with a new purpose and identity. This loyalty is tested and proven when she chooses to stay and defend him even after their contract is voided during a dire attack, simply stating that her choice to protect him is now her own free will.
Throughout the series, Izumi demonstrates significant development, moving from a deeply traumatized and suicidal individual to a more settled and purposeful person. Her past experiences left her depressed and distrustful, but her arrangement with Tosaki gives her a structured life and a reason to exist. Her stoicism remains, but her interactions, particularly with other Ajin like Kōji Tanaka, hint at a growing emotional capacity. After a psychic collision of their IBMs, she gains a deeper understanding of him, and later risks her safety to rescue him from government capture, ultimately offering him a place to stay and a chance at a new life, mirroring the second chance she herself was given.
In terms of abilities, Izumi is a highly proficient Ajin. Beyond her immortality, which allows her to recover from any lethal injury, she has mastered control over her Black Ghost, which she has named Kuro. This entity has a distinct head shaped like an elongated pyramid and is a formidable weapon in combat, capable of defending against and defeating the ghosts of other Ajin. While most Ajin possess a Paralyzing Scream that can immobilize nearby humans, she has never been shown using this ability in the series. Her primary assets are her tactical intelligence, her unwavering loyalty, and the precise, powerful control she exerts over her supernatural companion.
Her outward personality is stoic, quiet, and intensely reserved. She typically speaks only when necessary, delivering information in short, direct sentences, especially when reporting to her employer. Despite this serious and professional demeanor, she is not devoid of emotion and can become easily embarrassed in personal situations, such as when her casual clothing is commented upon or when she inadvertently says too much to someone during an interrogation. Her intelligence and capacity for understanding are notable, allowing her to assess situations and people, including Kei Nagai's younger sister, with a level of perception that is crucial to her role.
The reserved nature she displays is a direct result of a deeply traumatic past. As Yōko Tainaka, she lived in poverty with her mother and abusive stepfather. After a painful personal betrayal, she attempted to take her own life, an act that led to a violent confrontation with her stepfather, resulting in her death and subsequent resurrection, which revealed her nature as an Ajin. Believing her mother had conspired to sell her to the government, she fled and lived a desperate life on the streets. It was during this period that her Black Ghost first appeared to her in her loneliness. Eventually, she was tracked down in a hospital by the government agent Yū Tosaki. He revealed the truth that her mother had in fact died trying to protect her from her stepfather's scheme. Confronted with this reality and the revelation that her parents were both dead, she died of her illness and revived before Tosaki, confirming her status. To escape her past, she entered a special contract with him, taking a new identity. Her chosen name, Izumi Shimomura, honors her mother's maiden name and her biological father's surname, symbolizing her decision to move forward while carrying the memory of her family.
Her primary role in the story is that of the personal bodyguard and assistant to Yū Tosaki, who works for the Ministry of Health, Labour and Welfare. Her duty is to protect him from the various threats that arise in their pursuit of other Ajin. Her relationship with Tosaki is the central pillar of her new life. It is a complex professional bond built on mutual dependence. He relies heavily on her abilities for protection and field operations, holding the secret of her identity as leverage to ensure her service. For her part, she understands his methods and is intensely loyal, grateful to him for providing her with a new purpose and identity. This loyalty is tested and proven when she chooses to stay and defend him even after their contract is voided during a dire attack, simply stating that her choice to protect him is now her own free will.
Throughout the series, Izumi demonstrates significant development, moving from a deeply traumatized and suicidal individual to a more settled and purposeful person. Her past experiences left her depressed and distrustful, but her arrangement with Tosaki gives her a structured life and a reason to exist. Her stoicism remains, but her interactions, particularly with other Ajin like Kōji Tanaka, hint at a growing emotional capacity. After a psychic collision of their IBMs, she gains a deeper understanding of him, and later risks her safety to rescue him from government capture, ultimately offering him a place to stay and a chance at a new life, mirroring the second chance she herself was given.
In terms of abilities, Izumi is a highly proficient Ajin. Beyond her immortality, which allows her to recover from any lethal injury, she has mastered control over her Black Ghost, which she has named Kuro. This entity has a distinct head shaped like an elongated pyramid and is a formidable weapon in combat, capable of defending against and defeating the ghosts of other Ajin. While most Ajin possess a Paralyzing Scream that can immobilize nearby humans, she has never been shown using this ability in the series. Her primary assets are her tactical intelligence, her unwavering loyalty, and the precise, powerful control she exerts over her supernatural companion.