The official website for the television anime adaptation of Rui Tsukiyo's Sekai Saikou no Ansatsusha, Isekai Kizoku ni Tensei suru (The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat) light novel revealed additional cast, key visual (pictured), and first promotional video. The anime will be broadcasted on October 6 at 11:00 p.m. on AT-X, followed by Tokyo MX, KBS Kyoto, San TV, TV Aichi, BS TV.

Cast
Kian: Toshiyuki Morikawa (Mushoku Tensei: Isekai Ittara Honki Dasu)
Esri: Chiaki Takahashi (Megami-ryou no Ryoubo-kun.)
Megami: Yukari Tamura (Slime Taoshite 300-nen, Shiranai Uchi ni Level Max ni Nattemashita)
Satsusha Rou: Junpei Morita (Kaguya-sama wa Kokurasetai? Tensai-tachi no Renai Zunousen)

Staff
Chief Animation Director: Kaori Yoshikawa (Deca-Dence animation director)
Sub Character Design: Arisa Fujii (Meikyuu Black Company)
Weapon Design: Yoshihiro Ujiie (Mahou Shoujo Tokushusen Asuka)
Prop Design: Akane Imada (Tsuki ga Michibiku Isekai Douchuu)
Art Director, Art Design: Hiroya Yoshiyama (Mekakucity Actors background art)
Art Assistant: Asuka Komiyama (Otome Game no Hametsu Flag shika Nai Akuyaku Reijou ni Tensei Shiteshimatta... art director)
Color Design: Hayato Yoshida (Midara na Ao-chan wa Benkyou ga Dekinai)
Director of Photography: Yuuko Shintani (Nakanohito Genome [Jikkyouchuu])
Graphic Design: Susumu Kashiwabara (Fate/Kaleid Liner Prisma Illya: Prisma Phantasm director of photography)
CG Director: Keiichi Eda (Gleipnir)
Editing: Misato Takikawa (Assassins Pride)
Sound Director: Masanori Tsuchiya (Kaifuku Jutsushi no Yarinaoshi)
Sound Effects: Kiyotaka Kawata (BNA)
Music: Kenichi Kuroda (Seijo no Maryoku wa Bannou Desu)
Sound Production: Glovision
Music Production: Lantis

Masafumi Tamura (Maou Gakuin no Futekigousha) is helming the series as SILVER LINK. and Studio Palette. Katsuhiko Takayama (Aldnoah.Zero) is handling the series composition and penning the script. Eri Osada (Blade & Soul) is the character designer.

Tsukiyo began writing the action fantasy series on the Shousetsuka ni Narou website in July 2018. Kadokawa began publishing the novel through its Sneaker Bunko imprint featuring illustrations by Reia in February 2019 and shipped the sixth volume on February 27.

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Source: Comic Natalie