Aquamarine Hoshino Personality: A Vengeful and Cunning Anti-Hero
Updated: Monday, December 22, 2025
MBTI
INTJ
Enneagram
5w6
Alignment
True Neutral
Aquamarine “Aqua” Hoshino, formerly known as Gorou Amamiya, a medical doctor who had a crush on Ai Hoshino. This analysis focuses on the personality of Aqua and how he changes throughout the story, arguing that Aqua is a vengeful and cunning anti-hero who uses his intelligence, acting skills, and manipulation to achieve his goals.
Aqua’s Personality
Aquamarine Hoshino is an analytical, ambitious, loyal, and empathetic person. He has a keen intellect and a sharp memory, which he inherited from his previous life as a doctor. He is able to quickly grasp complex concepts and devise effective strategies for various situations. He is also very knowledgeable about idols and their industry, as he was a devoted fan of Ai Hoshino and B-Komachi, her former idol group.
Aquamarine’s personality was shaped by his experiences as Gorō Amamiya, who lived a lonely and stressful life as a doctor. He had no friends or family, and he was constantly under pressure from his superiors and patients. He developed a cynical and pessimistic view of the world, and he felt no joy or purpose in his work. He only found solace in watching idols, especially Ai Hoshino, who he admired for her talent, beauty, and charisma. He became obsessed with her, and he collected her merchandise and attended her concerts. He also met Sarina, a young girl who was diagnosed with terminal cancer and shared his passion for idols. He formed a bond with her, and he promised to take her to Ai’s concert before she died.
However, Gorō’s life took a tragic turn when he witnessed Ai’s murder by a stalker during her concert. He was devastated by the loss of his idol and his friend, and he blamed himself for not being able to save them. He also realized that the idol industry was full of corruption, exploitation, and violence, and he felt betrayed by his idealized image of idols. He died shortly after, in a car accident caused by his reckless driving.
After his death, Gorō was reincarnated as Aquamarine Hoshino, along with Sarina, who became his twin sister Ruby. He retained his memories and personality from his previous life, but he also gained a new perspective and a new goal. He decided to use his second chance to become an idol producer and make his sister and his idol oshi happy. He also wanted to expose and reform the dark side of the idol industry, and prevent any tragedies like Ai’s death from happening again.
As Aquamarine, he showed a more proactive and optimistic attitude than Gorō. He was determined to achieve his dream, and he worked hard to improve his skills and talents. He was also more sociable and friendly, and he made friends with other idols and producers. He was especially close to his sister Ruby, who he loved and cared for deeply. He was very protective of her, and he would do anything to support her and make her smile. He also had a strong bond with Ai Hoshino, who he recognized as his idol oshi from his previous life. He respected and admired her, and he wanted to help her reach her full potential as an idol. He also developed romantic feelings for her, which he struggled to express and cope with.
Aquamarine was not without flaws, however. He could be arrogant and stubborn, and he often clashed with others who had different opinions or goals. He could also be reckless and impulsive, and he sometimes acted without considering the consequences or risks. He was prone to anger and frustration, and he had difficulty controlling his emotions. He also had a tendency to isolate himself and hide his true feelings, especially when he was hurt or conflicted. He was haunted by his past traumas and regrets, and he suffered from guilt and insecurity. He feared losing his loved ones again, and he doubted his own worth and happiness.
Relationships
- Ruby Hoshino: Aquamarine’s twin sister and the reincarnated soul of Sarina. They have a very close and loving relationship, and they share a passion for idols. Aquamarine is very protective and supportive of Ruby, and he wants to make her happy. Ruby is also very loyal and caring for Aquamarine, and she tries to cheer him up and help him with his problems. They often tease and bicker with each other, but they also have a lot of fun and heartwarming moments together. They are each other’s best friend and family.
- Ai Hoshino: Aquamarine’s idol oshi and the reincarnated soul of the idol who Gorō was obsessed with. They have a complex and dynamic relationship, which evolves from idol-fan to friends to rivals to lovers. Aquamarine respects and admires Ai, and he wants to help her achieve her dream of becoming a top idol. He also has romantic feelings for her, which he tries to hide or deny. Ai is initially unaware of Aquamarine’s true identity and feelings, but she gradually grows to trust and appreciate him. She also develops romantic feelings for him, which she struggles to accept and reciprocate. They have a lot of conflicts and misunderstandings, but they also have a lot of chemistry and attraction. They share a deep connection and a mutual understanding, and they influence and inspire each other.
- Akane Kurokawa: Aquamarine’s friend and fellow idol producer. They have a friendly and competitive relationship, and they often collaborate and challenge each other. Akane is impressed by Aquamarine’s talent and ambition, and he respects and supports him. He also teases and provokes him, and he tries to get him to open up and have fun. Aquamarine is grateful and annoyed by Akane, and he considers him a rival and a partner. He also confides and relies on him, and he values his friendship.
- Dr. Gorō Amamiya: Aquamarine’s previous incarnation and the source of his memories and personality. They have a complicated and conflicted relationship, and they often communicate through dreams and visions. Gorō is proud and worried about Aquamarine, and he wants to guide and protect him. He also regrets and apologizes for his mistakes and failures, and he hopes that Aquamarine can find happiness and peace. Aquamarine is grateful and resentful of Gorō, and he wants to honor and surpass him. He also blames and forgives him, and he seeks his approval and advice.
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