Aquamarine “Aqua” Hoshino, the calculating and emotionally conflicted protagonist of Oshi no Ko, is voiced by Takeo Otsuka in the original Japanese version and Jack Stansbury in the English dub. Both actors received praise for portraying Aqua’s cold intelligence, emotional trauma, and hidden vulnerability throughout the series.
Japanese Voice Actor: Takeo Otsuka
Date of Birth
October 19, 1992
About Takeo
Takeo Otsuka is a Japanese voice actor known for portraying calm, introspective, and emotionally layered protagonists across anime and games. His performance as Aquamarine Hoshino became one of the breakout roles of his career thanks to the character’s psychological complexity and emotionally restrained personality.
As Aqua, Otsuka delivers a subtle performance built around emotional suppression, grief, and obsession. His restrained delivery allows small emotional shifts to carry enormous weight, especially during scenes connected to Ai Hoshino and Aqua’s pursuit of revenge.
Otsuka’s performance was widely praised for balancing Aqua’s detached exterior with the emotional pain hidden underneath.
Hometown
Tokyo, Japan
Career Highlights
Takeo Otsuka gained major recognition during the 2020s through several leading anime roles.
Some of his best-known performances include:
- Aquamarine Hoshino — Oshi no Ko
- Jinshi — The Apothecary Diaries
- Leon Fou Bartfort — Trapped in a Dating Sim
- Makoto Kurume — The Gene of AI
- Oga — Ranking of Kings related media appearances
- Additional roles in fantasy and drama anime productions
His portrayal of Aqua quickly became one of the most discussed anime performances of 2023.
Full Current Filmography
The following list reflects documented credits from publicly available sources and may not be exhaustive.
Anime Television
- Oshi no Ko — Aquamarine Hoshino (2023–present)
- The Apothecary Diaries — Jinshi (2023–present)
- Trapped in a Dating Sim: The World of Otome Games Is Tough for Mobs — Leon Fou Bartfort (2022)
- The Gene of AI — Hikaru Sudō / Makoto Kurume related appearances (2023)
- SK8 the Infinity — Supporting Voices
- Ranking of Kings — Supporting roles
- Mobile Suit Gundam: The Witch from Mercury — Additional Voices
Anime Films
- Oshi no Ko promotional and special projects — Aquamarine Hoshino
Video Games
- Granblue Fantasy — Voice roles
- Blue Archive — Voice appearances
- Fire Emblem Heroes — Additional voices
- Genshin Impact related Japanese media appearances
Critical Reception
Takeo Otsuka’s portrayal of Aqua received widespread praise from anime critics and viewers for its emotional restraint and psychological realism. Reviewers frequently highlighted how effectively he communicated Aqua’s grief and obsession without relying on exaggerated emotional performances.
Fans especially praised his quieter scenes, where subtle changes in tone and pacing revealed Aqua’s internal emotional conflict beneath his calm demeanor.
His work on Oshi no Ko established him as one of the standout rising voice actors of the decade.
Our Sources
Behind The Voice Actors – Aquamarine Hoshino cast listing (https://www.behindthevoiceactors.com/tv-shows/Oshi-no-Ko/Aquamarine-Hoshino/)
Wikipedia – Takeo Otsuka biography and filmography (https://en.wikipedia.org/wiki/Takeo_Otsuka)
Oshi no Ko official anime website (https://ichigoproduction.com/)
Anime News Network encyclopedia entry for Oshi no Ko (https://www.animenewsnetwork.com/encyclopedia/anime.php?id=26309)
Social Media
Official Agency Profile: https://www.imenterprise.jp/profile.php?id=95
English Voice Actor: Jack Stansbury
Date of Birth
Jack Stansbury’s full birth date is not publicly documented.
About Jack
Jack Stansbury is an American voice actor known for anime dubbing, gaming performances, and character-driven dramatic roles. His portrayal of Aquamarine Hoshino in the English dub of Oshi no Ko received praise for capturing Aqua’s emotionally detached personality, sharp intelligence, and underlying emotional trauma.
As Aqua, Stansbury delivers a controlled and restrained performance that mirrors the character’s guarded emotional state. His quieter line delivery and subtle emotional shifts became especially important during scenes involving Ai Hoshino, revenge, and Aqua’s internal psychological conflict.
His performance helped establish Aqua as one of the most emotionally layered protagonists in recent anime dubs.
Hometown
Not publicly documented.
Career Highlights
Jack Stansbury gained increased recognition through modern anime and game dubbing projects.
Some of his notable performances include:
- Aquamarine Hoshino — Oshi no Ko
- Additional roles in anime and multimedia dubbing productions
- Voice work in modern game localization projects
His portrayal of Aqua became one of his most widely recognized performances because of the massive popularity of Oshi no Ko.
Full Current Filmography
The following list reflects publicly documented credits and may not be exhaustive.
Anime Television
- Oshi no Ko — Aquamarine Hoshino (2023–present)
- Additional anime dub performances and supporting roles
Anime Films
- Oshi no Ko promotional and special projects — Aquamarine Hoshino
Video Games
- Additional voice work in gaming and multimedia productions
Critical Reception
Jack Stansbury’s portrayal of Aqua received strong praise from fans of the English dub for maintaining the character’s emotional subtlety and psychological tension. Viewers frequently highlighted how effectively he conveyed Aqua’s grief and emotional isolation without overplaying the character’s emotions.
Critics and fans also praised the chemistry between Stansbury and the English cast portraying Ruby, Kana, and Ai, helping preserve the emotional core of the original series.
His restrained vocal approach became one of the defining aspects of Aqua’s English-language portrayal.
Our Sources
Behind The Voice Actors – Aquamarine Hoshino cast listing (https://www.behindthevoiceactors.com/tv-shows/Oshi-no-Ko/Aquamarine-Hoshino/)
Anime News Network encyclopedia entry for Oshi no Ko (https://www.animenewsnetwork.com/encyclopedia/anime.php?id=26309)
Oshi no Ko official anime website (https://ichigoproduction.com/)
Sentai Filmworks production information (https://www.sentaifilmworks.com/)
Social Media
X / Twitter: https://x.com/JackStansbury_
