A new trailer, opening theme song, and more cast members have been unveiled for the upcoming The Seven Knights of the Marronnier Kingdom TV anime series. The anime is scheduled to begin broadcasting in Japan on October 3, 2026 and will also stream worldwide exclusively on Prime Video.
The anime’s main opening theme, which is highlighted in the trailer, is “Sayonara wa Iwanai” by Japanese singer yama.
Additionally, the five new cast members (from left to right below) include:
- • Miyuki Sakurai as Eleonora
- • Natsumi Fujiwara as Brunhild
- • Takehito Koyasu as Elliot
- • Kazuyuki Okitsu as Hugo
- • Daisuke Namikawa as Peregrinus
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates 
©岩本ナオ／小学館／NHK・NEP・Amazon Content Services LLC or its Affiliates
The anime’s official website lists three additional cast members, which has Hiroshi Tsuchida as King Lionel (left below), Maki Kawase as Anna-Marie (center below), and Kyo Yaoya as Lavinia (right below).
They join a previously announced voice cast that will star:
- • Kengo Takanashi as Insomniac
- • Makoto Tanigawa as Fraternity
- • Haruki Ishiya as Feverish
- • Satoshi Inomata as Chilly
- • Kiyoto Mizuno as Beast Tamer
- • Taishi Murata as Swordsman
- • Reiji Kawashima as Hungry
- • Akeno Watanabe as Baribara
- • Sho Hayami as the narrator
Kiyoko Sayama (Vampire Knight) is directing the anime series, with Shinzo Fujita (To Your Eternity) as series composer and Yuriko Maeda as character designer. J.C.STAFF is in charge of the animation production.
The historical fantasy manga series by Nana Iwamoto began serialization in Shogakukan’s josei Monthly Flowers magazine in September 2016. Eleven tankobon volumes have been released in Japan as of June 2026. The series placed first in the This Manga is Amazing! 2018 ranking’s female category. It is known in Japanese as Marronnier Oukuni no Shichinin no Kishi.
The Seven Knights of the Marronnier Kingdom follows the seven sons of the Marronnier Kingdom’s female general.
Sources: The Seven Knights of the Marronnier Kingdom Official X/Twitter (2) (3), official anime website, Anime News Network
