
Who is the voice actor for Hoshino Aquamarine in "Oshi no Ko"? An in-depth analysis of how Otsuka Takeo portrays the duality of revenge and tenderness
Since the phenomenal anime "Oshi no Ko" was released, the charming characters in the series have sparked widespread discussion. Among them, the male protagonist Hoshino Aquamarine (Aqua), with his complex inner world and his struggles in the entertainment industry for revenge, has become the focus of fan attention. The one who gives this character its soul is the talented voice actor of the new generation - Takeo Otsuka. This article will delve into how Takeo Otsuka perfectly interprets Aqua's huge transformation from a gentle doctor to a vengeful youth through his voice, and introduce this voice actor's background and other representative works.

The Challenge of Portraying Dual Identities: From Gentle Doctor to Son of Revenge
The biggest characteristic of the character Hoshino Aquamarine is that he carries the soul of the obstetrician-gynecologist "Amamiya Gorou" within him. After his mother Hoshino Ai was tragically murdered, Gorou, who was reborn as Aqua, carries the heavy past and embarks on a path of revenge to find the real culprit. This also means that the voice actor who voices him must be able to seamlessly switch between the calm and steady thinking of an adult and the youthful voice filled with melancholy.
Takeo Otsuka brilliantly accomplished this challenge. With his slightly deep, magnetic voice, he expresses Aqua's calmness and depth as he maneuvers within the entertainment industry; while interacting with characters like his sister Ruby or Arima Kana, he can reveal unintentional tenderness and care, interpreting the character's inner conflicts and struggles vividly.

Who is the Voice Actor of Hoshino Aquamarine? Getting to Know Takeo Otsuka
Takeo Otsuka is a Japanese male voice actor affiliated with I'm Enterprise, born on October 19, 1992, in Tokyo. Although he didn't particularly aspire to become a voice actor from a young age, influenced by his game-loving mother, he was exposed to otaku culture early on. He officially debuted in 2016 and won the Best Rookie Actor Award at the 14th Seiyu Awards in 2020, with his talent being highly recognized.
Takeo Otsuka's voice is known for being natural, gentle, and full of infectious energy, allowing him to quickly accumulate high popularity among fans. In interviews, he mentioned that when portraying the twins Aqua and Ruby, he particularly focused on expressing the unique bond and presence between the two.
Other Representative Works of Takeo Otsuka
Besides Hoshino Aquamarine in "Oshi no Ko," Takeo Otsuka is also active in many other well-known anime works, showcasing his wide range:
- "The Apothecary Diaries" - Jinshi: He voiced the eunuch Jinshi, who possesses peerless beauty and significant power, perfectly presenting the character's sometimes noble, sometimes scheming nature, as well as the pure-hearted side he reveals when facing Maomao.
- "Run with the Wind" - Kurahara Kakeru: Voicing one of the main characters, Kurahara Kakeru, he fully expressed the delicate and determined traits of this taciturn track and field genius who is deeply passionate about running.
- "The Yuzuki Family's Four Sons" - Kibana Hyouma: In this work, he plays the male protagonist who holds a strong hatred for "Tsukumogami," interpreting the character's coldness and subsequent transformation very well.
- "Medalist" - Akira Roushi: Voicing the passionate and professional skating coach Akira Roushi, he displayed a mature and charming voice.
From a vengeful youth, a handsome eunuch, to a passionate athlete, Takeo Otsuka has proven his talent and potential through diverse roles, becoming one of the most notable new-generation voice actors today.
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