In the Japanese version of Mobile Suit Gundam: Iron-Blooded Orphans, Atra Mixta is voiced by Hisako Kanemoto. In the English dub, Atra is voiced by Cassandra Lee Morris. Gundam’s official cast page lists Kanemoto as Atra, and English dub cast databases list Cassandra Lee Morris for the dub.
Japanese Voice Actor: Hisako Kanemoto
Date of Birth
Hisako Kanemoto’s official agency profile lists her birthday as December 16. Public filmography databases commonly list the full date as December 16, 1987, but her agency page itself does not display the year, so the birth year is not confirmed here from an official profile.
About Hisako
Hisako Kanemoto is a Japanese voice actress represented by Production Baobab. Her official profile lists a wide range of anime, game, dubbing, narration, and radio work, and it includes Atra Mixta in Mobile Suit Gundam: Iron-Blooded Orphans among her notable anime credits. She is also widely known for roles such as Ami Mizuno/Sailor Mercury in Sailor Moon Crystal, Erina Nakiri in Food Wars!, Aoi Hinami in Bottom-Tier Character Tomozaki, and Epsilon in The Eminence in Shadow.
Hometown
Kanemoto’s official agency profile lists her as being from Okayama Prefecture, Japan, and notes Okayama dialect among her dialect skills. I did not find an official source in the materials reviewed that gives a more specific hometown than Okayama Prefecture.
Career Highlights
For Gundam viewers, Kanemoto’s key role here is Atra Mixta, one of the emotional centers of Iron-Blooded Orphans and one of the series’ most important civilian characters. Gundam’s official cast page names her as Atra, and the official character pages show Atra’s continuing importance across both seasons.
Beyond Gundam, her official profile highlights an especially strong run of recognizable anime roles: Sailor Mercury in Sailor Moon Crystal, Yayoi Kise/Cure Peace in Smile PreCure!, Amy in Gargantia on the Verdurous Planet, Haruka Kotoura in The Troubled Life of Miss Kotoura, Ginko Sora in The Ryuo’s Work Is Never Done!, and Tsugumi Hazawa in BanG Dream! Her game work is also substantial, including Djeeta in Granblue Fantasy, Nilou in Genshin Impact, and Fie Claussell in The Legend of Heroes: Trails of Cold Steel series.
Full Current Filmography
The list below reflects documented credits currently visible on Hisako Kanemoto’s official Production Baobab profile as of March 30, 2026. Because the profile is a curated official résumé and repeatedly labels the credits as “among many others,” this should be read as a source-limited documented credits list rather than a guaranteed complete lifetime filmography. The entries are organized by medium following the structure of the official profile.
Anime
GAMERA -Rebirth- — Boco
銀河特急 ミルキー☆サブウェイ — Akane
機動戦士Gundam GQuuuuuuX — Deux Murasame
The Eminence in Shadow — Epsilon
Mobile Suit Gundam: Iron-Blooded Orphans — Atra Mixta
Sailor Moon Crystal — Ami Mizuno / Sailor Mercury
Smile PreCure! — Yayoi Kise / Cure Peace
Bottom-Tier Character Tomozaki — Aoi Hinami
Can a Boy-Girl Friendship Survive? (No, It Can’t!!) — Sakura Natsume
Onimai: I’m Now Your Sister! — Kaede Hozuki
REVENGER — Nio
The Ryuo’s Work Is Never Done! — Ginko Sora
Sword Oratoria: Is It Wrong to Try to Pick Up Girls in a Dungeon? On the Side — Filvis Challia
Knights of Sidonia — Yuhata Midorikawa
Gargantia on the Verdurous Planet — Amy
The Troubled Life of Miss Kotoura — Haruka Kotoura
Maria the Virgin Witch — Maria
Sound of the Sky — Kanata Sorami
Girls und Panzer — Katyusha / Hoshino
The Seven Deadly Sins — Veronica
Theatrical Anime
Natsume’s Book of Friends: The Waking Rock and the Strange Visitor — Mitsumi
Children Who Chase Lost Voices — Asuna Watase
The Garden of Sinners: Future Gospel — Mana Ryogi
Bodacious Space Pirates: Abyss of Hyperspace — Gruier Serenity
Aura: Koga Maryuin’s Last War — Shina Kobato
Games
Granblue Fantasy — Djeeta
BanG Dream! Girls Band Party! — Tsugumi Hazawa
Final Fantasy series — Eiko Carol
Gunslinger Stratos 2 — Kyoka Katagiri
The Legend of Heroes: Trails of Cold Steel — Fie Claussell
Harry Potter: Magic Awakened — Female Protagonist
Sword Art Online: Lost Song — Seven
Genshin Impact — Nilou
Dubbing
Preacher — Kris Schenck
The Musketeers — Camille
Bones Season 8 — Miranda
CSI: Crime Scene Investigation Season 10 — Gracie
Begin Again — Violet
The Resident — Sonia
Narration / Radio / Other documented work
Anime Mashite — narration
Anison Plus — narration
Radio: Afterglow no Yuuyake STUDIO SPECIAL FM NACK5
Radio: Kanemoto Hisako to Kawakami Chihiro no Terra Musume-ya
Okayama “Sunny Country Ambassador” and related Okayama public promotional work
Critical Reception
The clearest formally documented recognition for Kanemoto is that she won Best Rookie Actress at the 5th Seiyu Awards. That award is a stronger public indicator of early industry recognition than any single review I found during this check.
Her official résumé also suggests why she remains highly visible: it spans lead heroines, cheerful mascots, emotionally grounded dramatic roles, and major game performances. That breadth helps explain why Atra Mixta fits naturally into her body of work, especially because Atra requires warmth and steadiness more than overt theatricality. That last point is an inference from her documented role pattern, not a quoted critical judgment.
For background reading:
Production Baobab official profile for Hisako Kanemoto (https://pro-baobab.jp/actor/%E9%87%91%E5%85%83-%E5%AF%BF%E5%AD%90/)
Mobile Suit Gundam: Iron-Blooded Orphans official cast page (https://en.gundam.info/series/tekketsu/staff/index.html)
Hisako Kanemoto official blog (https://ameblo.jp/kanemoto-hisako/)
Social Media
Blog: 金元寿子オフィシャルブログ「行き先はいつも気ままに」 (https://ameblo.jp/kanemoto-hisako/)
English Voice Actor: Mamiko Noto
Date of Birth
Cassandra Lee Morris’s birth date is publicly listed as April 19, 1982, on major public databases. Her official website does not currently publish her full birth date, so that date should be read as publicly documented rather than officially posted on her own bio page.
About Cassandra
Cassandra Lee Morris is a Los Angeles-based American voice actor. On her official bio page, she says she has voiced nearly 300 characters across video games, animation, and anime, and narrated more than 300 audiobooks. Her official site also emphasizes the kinds of roles she is most associated with: youthful, strong, and sharply defined characters.
For Gundam viewers, she is the English dub voice of Atra Mixta in Mobile Suit Gundam: Iron-Blooded Orphans, which is confirmed by character-specific dub listings.
Hometown
Morris’s official biography says she grew up in Connecticut. Public biographies commonly list New Haven, Connecticut as her birthplace, but her own site is more conservative and only confirms Connecticut as where she grew up, so that is the safest hometown-level detail to use here.
Career Highlights
Morris’s official bio highlights her major game work first, including lead or prominent roles in the Persona 5 franchise, League of Legends and Legends of Runeterra, Bugsnax, the Fire Emblem franchise, Fortnite, the Trails of Cold Steel franchise, Spyro the Dragon, NieR: Automata, NieR Re[in]carnation, and multiple Final Fantasy titles.
Her official bio also names anime work in Sword Art Online, My Hero Academia, Your Name., Toradora!, K-On!, Yu-Gi-Oh! GX, and Yu-Gi-Oh! 5D’s, while public role databases identify her especially with characters such as Taiga Aisaka, Morgana, and Leafa/Suguha Kirigaya. That combination explains why she is one of the most recognizable English dub actors for energetic, emotionally expressive female roles.
Full Current Filmography
The list below reflects documented credits I could verify from Cassandra Lee Morris’s official bio plus widely used public role databases available during this check. Her own website points readers to IMDb for a fuller master list, which means her official site is not itself a complete database-style filmography. Because of that, this should be read as a source-limited documented credits list and may not be exhaustive.
Anime
Mobile Suit Gundam: Iron-Blooded Orphans — Atra Mixta
Sword Art Online — Leafa / Suguha Kirigaya
Toradora! — Taiga Aisaka
K-On! — Ritsu Tainaka
Yu-Gi-Oh! GX — Alice / Yubel
Yu-Gi-Oh! 5D’s — documented on public filmography sources
My Hero Academia — documented on official bio as a credited series
Your Name. — documented on official bio as a credited title
Puella Magi Madoka Magica — Kyubey
Coppelion — Aoi Fukasaku
Doraemon — Sue
My Daemon — Kento Tachibana
Animation
Amphibia — documented on official bio as a credited series
Where’s Waldo? — documented on official bio as a credited series
Hanazuki — documented on official bio as a credited series
Stillwater — documented on official bio as a credited series
Barbie series — documented on official bio as credited work across multiple productions
Super Wings — documented on official bio as a credited series
Games
Persona 5 franchise — Morgana
League of Legends — documented on official bio as credited franchise work
Legends of Runeterra — documented on official bio as credited franchise work
Bugsnax — documented on official bio as credited title
Fire Emblem franchise — documented on official bio as credited franchise work
Fortnite — documented on official bio as credited title
Trails of Cold Steel franchise — documented on official bio as credited franchise work
Spyro the Dragon — documented on official bio as credited franchise work
NieR: Automata — documented on official bio as credited title
NieR Re[in]carnation — documented on official bio as credited title
Final Fantasy titles — documented on official bio as credited franchise work
Atelier Totori: The Adventurer of Arland — Totooria “Totori” Helmold
Bravely Default — Edea Lee
Bravely Second — Edea Lee
Audiobooks
Miraculous Ladybug — audiobook narration credits noted on official bio
Spirit Untamed — audiobook narration credits noted on official bio
Gossip Girl — audiobook narration credits noted on official bio
Pretty Little Liars — audiobook narration credits noted on official bio
The Clique — audiobook narration credits noted on official bio
Critical Reception
The clearest formally documented recognition for Morris is in audiobook performance. Her official bio lists an Audie win for Demon in the Wood in 2023, an Odyssey Honor for the same title, an Odyssey Honor for Redwood and Ponytail in 2020, and multiple additional Audie nominations stretching back to 2010. Those are stronger evidence of critical reception than casual fan commentary, because they come from established industry awards.
On the screen-performance side, her reputation is best reflected by the scale and consistency of her lead and signature roles. Her official bio foregrounds Persona 5, Sword Art Online, Toradora!, and other major franchises, while public role databases identify Taiga Aisaka, Morgana, and Leafa as especially defining performances. That does not amount to a formal critic review of her Atra Mixta performance specifically, but it does show how strongly she is identified with major English dub and game roles.
For background reading:
Cassandra Lee Morris official bio (https://www.cassandraleemorris.com/bio)
Cassandra Lee Morris official website (https://www.cassandraleemorris.com/)
Behind The Voice Actors character page for Atra Mixta (https://www.behindthevoiceactors.com/tv-shows/Mobile-Suit-Gundam-Iron-Blooded-Orphans/Atra-Mixta/)
Social Media
X: @SoCassandra (https://x.com/SoCassandra)
Instagram: @cassandra.morris (https://www.instagram.com/cassandra.morris/)
TikTok: @socassandra (https://www.tiktok.com/@socassandra)
YouTube: Cassandra Lee Morris (https://www.youtube.com/cassandraleemorris)
