The historical fantasy television anime Marronnier Oukuni no Shichinin no Kishi (The Seven Knights of the Marronnier Kingdom) has officially added four more names to its sprawling voice cast. Following its October 3, 2026 broadcast premiere in Japan, the adaptation produced by J.C.STAFF continues to build out its world with veteran and rising talent stepping into key supporting roles.
The newly announced cast additions include Naomi Shindo as Hyrokkin, Atsushi Ono as Rollo, Ai Kayano as Birgitta, and Yurie Funato as Kastehelmi. They join an already star-studded ensemble featuring Kengo Takanashi, Makoto Tanigawa, Natsuki Hanae, and Sho Hayami as the narrator, rounding out the intricate tapestry of characters populating Nana Iwamoto's beloved universe.
Creative Staff and Production Pedigree
Behind the scenes, the adaptation is steered by director Kiyoko Sayama, renowned for her work on Vampire Knight. The series composition is handled by Shinzo Fujita, whose previous credits include To Your Eternity, while Yuriko Maeda translates Nana Iwamoto’s delicate character designs into animation for J.C.STAFF. International streaming is managed globally by Prime Video.
The source material stems from Nana Iwamoto's acclaimed josei manga, which launched in Shogakukan’s Monthly Flowers magazine in September 2016 and secured the top spot in the female category of the 2018 This Manga is Amazing! guidebook. VIZ Media recently licensed the English publication, bringing the historical fantasy epic to a wider global audience.
At the heart of a continent of eight kingdoms lies the Marronnier Kingdom. Its general, Baribara, has seven sons, each with a unique gift and serving as a knight commander. Bound by a single noble cause of heroically rescuing a princess someday, the brothers set out as goodwill ambassadors to the seven neighboring kingdoms. What encounters, trials, and destinies await them in these unknown lands?
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