Gorou Amamiya

Gorou (ゴロー, Goro) is a character from Oshi no Ko manga. He is a doctor specializing in gynecology, and the one responsible for caring and delivering Ai Hoshino's baby. He is also Aquamarine Hoshino in the previous life.

Appearance
He is a man with jet black hair and square rimmed glasses. In all of his appearances, he always wore a doctor's white coat.

Story
Gorou worked his residency years on a hospital, located in the rural area of Miyazaki prefecture. He met Sarina during this time, a child patient affected with anaplastic astrocytoma, and he was introduced to her oshi, Ai Hoshino. They discuss about reincarnation, and share a cute moment, but later on it is revealed that she died, at the age of 12.

Four years later, Gorou became a doctor on the gynecology department the same hospital. He was caught watching on Ai's performance as a member of B-Komachi on a patient nurse by his nurse, and she informed him about the news of Ai's hiatus. She told the story about Sarina to the nurse, but she instead think of him as a pervert who uses sob story to justify his own obsession with Ai.

He then meet with another patient, a 20 weeks old pregnant teenage girl accompanied by an older man, her guardian. It was then revealed that the girl is Ai, and her guardian is her company president, Ichigo Saitou. Gorou battled over his feelings of a fan and moral obligation as a doctor, but then he had a conversation with Ai about her twin child and lies as a form of love, and her declaration to keep being an idol while having the twins secretly. He then assures his idol that he'll safely deliver them both, owning up his position as a fan.

They spent the next few weeks together, working on the process of keeping things secret and options for delivery that would not hinder her career, before she decided to do it naturally. The night of the due date, Gorou was approached by someone who knew about Ai's pregnancy and his role in it. He chases him away to a mountain trail, but then was murdered.

He then reincarnated into Aquamarine Hoshino, who were born that night along with his sister Ruby Hoshino.

Later on, a personification of Aqua's guilt over Ai's death manifested as Gorou, who lambasted him over his inability to save her.