Gorou Amemiya

Gorou Amemiya is a young obstetrician working at a general hospital in northern Miyazaki Prefecture, commonly nicknamed “Gorou.”

He wears angular under-rim glasses and carries an acrylic keychain in his name holder, revealing his otaku side.

He is a passionate fan of the idol Ai Hoshino, whom he originally came to admire through a pediatric patient he treated during his training.

By a twist of fate, Ai Hoshino secretly chooses Gorou’s hospital to give birth, setting his life — and death — on a very unusual path.

Born to a mother who died right after childbirth without revealing the identity of his father, Gorou carries deep-seated negative feelings about his own birth.

This trauma, combined with a strained relationship with his grandfather (though he got along relatively well with his grandmother), leads him to choose obstetrics and gynecology almost as a passive, resigned decision rather than a dream.

Despite this, he is a competent and sincere doctor who cares strongly for his patients, especially those who are isolated or abandoned.

His life as Gorou ends abruptly when he is murdered by Ai Hoshino’s stalker, but his story continues when he is reincarnated as her son, Aqua Hoshino.

On the surface, Gorou appears calm, easygoing, and somewhat sarcastic, with a dry sense of humor.

He is, however, highly empathetic, especially toward young patients who are suffering or lonely.

He is deeply affected by his own birth circumstances, feeling as though his life was purchased by his mother’s sacrifice.

This guilt and self-loathing color his worldview and contribute to a quiet, underlying pessimism.

He clashes with his grandfather and never fully resolves that conflict, which feeds into his emotional distance from family.

In contrast, he maintains a comparatively better, more stable relationship with his grandmother.

Gorou is described as being accustomed to dating and dealing with women, giving off a somewhat flirtatious, womanizing impression.

Because of this, Sarina Tendouji — later Ruby Hoshino — believes he might have disappeared due to some kind of woman-related trouble.

Despite that reputation, his kindness toward vulnerable patients is genuine, and he invests real emotional energy into their well-being.

He is particularly protective of those whose parents fail them, and he reacts strongly to perceived parental neglect.

Gorou graduates from a national medical university in Tokyo, indicating high academic ability.

After completing his training, he takes a position as an obstetrician at a general hospital in Takachiho, Miyazaki Prefecture.

His mother died right after giving birth to him, never revealing who his father was.

This unresolved mystery and the belief that he survived at the cost of his mother’s life become the core of his emotional scars.

Unable to shake off the feeling that his existence is built on a sacrifice, he has difficulty embracing his own life wholeheartedly.

His strained relationship with his grandfather adds further emotional distance from his remaining family.

Partly due to these circumstances, he chooses obstetrics and gynecology as a kind of “negative choice,” not out of idealism but out of resignation.

Even so, he grows into a capable and committed physician, almost in spite of his lack of initial passion.

During his training period, he encounters Sarina Tendouji, a young, terminally ill pediatric patient.

She is hospitalized for a long time and lives a lonely life, but Gorou continuously encourages and supports her, becoming someone she deeply relies on.

Sarina’s parents rarely visit, appearing to have all but abandoned their daughter, which enrages Gorou.

He fiercely resents their attitude and feels deep sympathy for Sarina, strengthening his protective instincts toward her.

After Sarina’s death, her influence pushes Gorou to become a hardcore fan of Ai Hoshino, the center of the idol group “B Komachi.”

He begins to support Ai Hoshino passionately, carrying that devotion with him into his working life at the Miyazaki hospital.

Later, Gorou takes a post at the hospital where he originally cared for Sarina, tying his professional path to the place that shaped his fandom.

His devotion to Ai Hoshino is thus inseparably linked to his memories of Sarina and what she longed for.

Sarina Tendouji is a young girl suffering from serious illness, living a long and isolated life in the hospital.

Gorou becomes her attending physician during his training and stays by her side, offering repeated emotional support and encouragement.

Sarina idolizes him, cherishing his visits and kindness as her lifeline in an otherwise lonely existence.

She also becomes an intense fan of Ai Hoshino, raving about the idol to Gorou and effectively converting him into a fan.

After Sarina’s death, her longing for idolhood and her love for Ai Hoshino heavily influence Gorou’s life and tastes.

He carries her wishes with him, which is part of why he feels compelled to protect Ai Hoshino later on.

In her reincarnated life as Ruby Hoshino, Sarina remembers her deep affection for Gorou.

When Ruby later forms her idol unit, she chooses the name “B Komachi” as a quiet wish to reconnect with the missing doctor who once supported her.

Ruby believes that Gorou may have gotten into trouble involving women, which could be why he went missing.

She remembers him as a slightly suggestive flirt who seemed accustomed to dating, despite his genuine kindness.

Gorou first becomes a fan of Ai Hoshino through Sarina Tendouji, who passionately recommends the idol to him.

After Sarina’s death, he continues supporting Ai Hoshino as a devoted otaku fan, seeing her as a symbol of Sarina’s dreams.

One day, while working at the Miyazaki hospital, he learns that a pregnant patient is arriving under secretive circumstances.

That patient turns out to be Ai Hoshino herself, seeking a discreet and remote location to give birth away from the public eye.

Gorou is initially shaken that his beloved idol is pregnant with twins, and that the father’s identity is unknown.

As a fan, he feels both stunned and conflicted, struggling with the contrast between Ai Hoshino’s idol image and her hidden reality.

However, when he hears Ai Hoshino’s sincere determination to continue her idol career while raising her children, he softens.

He empathizes with her struggles and ultimately resolves to protect her privacy and safely deliver her children as her attending physician.

He becomes one of the very few people who know the truth: that Ai Hoshino is a mother of twins and that their father’s identity is a secret.

His dual role as both fan and doctor puts him in a uniquely complex emotional position.

Shortly before her scheduled delivery, Gorou’s protective instincts lead him to investigate a suspicious man lingering near the hospital.

He correctly senses danger and decides to follow the man, hoping to keep Ai Hoshino safe.

This encounter ends tragically when the stalker attacks him and pushes him off a cliff.

Gorou dies from the fall, never making it back to the hospital to attend Ai Hoshino’s delivery.

Despite his death, Ai Hoshino successfully gives birth to twins.

Gorou’s soul reincarnates as one of those twins: her son, Aqua Hoshino.

From the perspective of the hospital and his colleagues, Gorou simply vanishes.

There is no immediate discovery of his body, and for a long time, he is treated as a missing person.

As time passes without any contact, the hospital eventually treats the prolonged absence as a de facto resignation.

When others inquire later, the institution can only report that he abruptly stopped coming to work and was formally recorded as having left his position after extended non-contact.

His remains are not found until much later in the story.

In the sixth arc, titled “Private,” Ruby Hoshino and Akane Kurokawa discover his skeleton.

This discovery confirms that Gorou was murdered and did not simply run away or disappear voluntarily.

For Ruby, who once knew him as Sarina, and for Aqua, who is his reincarnation, this revelation is deeply emotional and significant.

After his death, Gorou is reincarnated as Aqua Hoshino, one of Ai Hoshino’s twin children.

As Aqua, he retains his memories of being Gorou Amemiya.

This reincarnation allows him to continue watching over the path of the idol he once supported not only as a fan but also as her child.

It also gives him the chance to stay near Sarina’s reincarnation, Ruby Hoshino, who was once his patient.

One of Gorou’s notable lines encapsulates his motivation: “I only want to see her walk the path she dreamed of.”

That “her” refers to the girl whose dreams he wants to see fulfilled, connecting back to Sarina and Ai Hoshino and their intertwined wishes.

His life as Aqua is shaped by this lingering desire to protect and observe the futures of those he cherished as Gorou.

In that sense, his story does not end with his death near the cliff, but transforms into a new life with a new name.

In early promotional materials, plot summaries, and the first anime promotional video, Gorou is framed as if he is the main protagonist.

This is not entirely wrong — he is crucial to the narrative — but his on-screen presence as Gorou Amemiya is actually limited to the beginning and later flashbacks.

This marketing approach was intentional, hiding the fact that Oshi no Ko is a reincarnation story to surprise new readers and viewers.

Audiences who expect a straightforward medical-drama-like story are instead thrown into a complex tale involving idols, reincarnation, and revenge.

In the original manga, Gorou’s full name, Gorou Amemiya, is not revealed until chapter 75.

However, in the anime adaptation, his full name is provided from the very first episode, and corresponding name labels are added where the manga originally omitted them.

According to early concept notes, the initial idea for Gorou’s character (or his prototype) was not that of a doctor but of a delinquent.

This concept was later changed to make him a physician instead, due to ethical concerns and suitability for the story’s themes.

Gorou Amemiya’s nickname is “Gorou,” and he is often called this by those around him.

Sarina Tendouji affectionately refers to him as “Doctor,” emphasizing her trust and reliance on him.

In the anime adaptation of Oshi no Ko, Gorou Amemiya is voiced by Kento Itou.

In the live-action adaptation, he is portrayed by Ryo Narita.

These portrayals emphasize his dual nature as a slightly jaded yet deeply compassionate young doctor.

They also highlight his transformation from ordinary medical professional and idol otaku into a central figure whose death and rebirth drive the entire story of Oshi no Ko.