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Ami Koshimizu is a Japanese voice actress, actress, and singer whose work spans television anime, theatrical animation, video games, music projects, and dubbing. Born on February 15, 1986, in Tokyo, she began performing as a child and later became one of the most recognizable voice performers of her generation. Public profiles list her early association with Theater Company Wakakusa and her transition into voice acting as a teenager, with her first major lead arriving in the title role of Nadja Applefield in Ashita no Nadja in 2003.
Koshimizu's early anime work quickly showed the range that would define her career. After Ashita no Nadja, she voiced Tenma Tsukamoto in School Rumble, Anemone in Eureka Seven, Kallen Stadtfeld in Code Geass, and Holo in Spice and Wolf. These roles placed her in several influential 2000s anime series and gave her a mix of comic, dramatic, romantic, and action-oriented characters. Her performance as Kallen in Code Geass was among the roles associated with her win for Best Supporting Actress at the first Seiyu Awards.
In later anime work, Koshimizu continued to appear in prominent franchises and ensemble casts. She voiced Hibiki Hojo/Cure Melody in Suite PreCure, Ryuko Matoi in Kill la Kill, Sailor Jupiter/Makoto Kino in Sailor Moon Crystal and related films, Mikumo Guynemer in Macross Delta, and characters in series such as A Certain Scientific Railgun, Saki, Bungo Stray Dogs, Demon Slayer: Kimetsu no Yaiba, Lycoris Recoil, The Apothecary Diaries, and Spice and Wolf: Merchant Meets the Wise Wolf. Her casting history shows both long-term franchise continuity and regular movement into new productions.

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Her video-game work is similarly extensive. Koshimizu has voiced Yukiko Amagi in Persona 4, Agnès Oblige in Bravely Default, Eleanor Hume in Tales of Berseria, Mai Shiranui in later The King of Fighters projects, Beidou in the Japanese version of Genshin Impact, Projekt Red and Zima in Arknights, and Miyabi in Zenless Zone Zero. These roles made her voice familiar not only to anime audiences but also to players of role-playing games, fighting games, and mobile titles.
Koshimizu has also recorded music and character songs. Her Columbia profile lists personal details and early leading works, while fan and industry databases document a large number of anime, game, and music credits. Agency changes have also been part of her career: public sources describe her time with Production Baobab, her move to Axlone in 2011, a period as a freelancer after 2018, and the establishment of Office Restart as her agency affiliation in 2022.
Because Japanese voice acting often depends on recurring franchise roles, Koshimizu's career is best understood as cumulative. She is not tied to a single character; instead, she has maintained visibility through repeated major roles across two decades. Holo in Spice and Wolf, Kallen in Code Geass, Ryuko in Kill la Kill, Cure Melody in Suite PreCure, Sailor Jupiter in Sailor Moon Crystal, Yukiko in Persona 4, and Beidou in Genshin Impact represent different corners of her work: fantasy, mecha, magical-girl animation, action comedy, game performance, and long-running franchise dubbing. That range has made her a durable figure in contemporary Japanese voice acting.
References:
[1] Wikipedia, “Ami Koshimizu” — https://en.wikipedia.org/wiki/Ami_Koshimizu
[2] Columbia Japan, “小清水亜美 profile” — https://columbia.jp/koshimizuami/profile.html
[3] The Movie Database, “小清水亜美” — https://www.themoviedb.org/person/1220947
[4] Anime News Network, “Results of Japan's First Ever Seiyuu Awards Announced” — https://www.animenewsnetwork.com/news/2007-03-05/results-of-japan%27s-first-ever-seiyuu-awards-announced
[5] Wikipedia, “Ashita no Nadja” — https://en.wikipedia.org/wiki/Ashita_no_Nadja
[6] Wikipedia, “School Rumble” — https://en.wikipedia.org/wiki/School_Rumble
[7] Wikipedia, “Code Geass” — https://en.wikipedia.org/wiki/Code_Geass
[8] Wikipedia, “Spice and Wolf” — https://en.wikipedia.org/wiki/Spice_and_Wolf
[9] Wikipedia, “Kill la Kill” — https://en.wikipedia.org/wiki/Kill_la_Kill
[10] Wikipedia, “Sailor Moon Crystal” — https://en.wikipedia.org/wiki/Sailor_Moon_Crystal
[11] Wikipedia, “Persona 4” — https://en.wikipedia.org/wiki/Persona_4
[12] Wikipedia, “Genshin Impact” — https://en.wikipedia.org/wiki/Genshin_Impact

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