Anime

The World's Finest Assassin Gets Reincarnated in Another World as an Aristocrat (世界最高の暗殺者, 異世界貴族に転生する, Sekai Saikou no Ansatsusha, Isekai Kizoku ni Tensei Suru) is a Japanese anime series based on the The World's Finest Assassin Gets Reincarnated in a Different World as an Aristocrat Light Novels by Rui Tsukiyo and Reia. The first season was directed by Masafumi Tamura at Silver Link & Studio Palette and was originally supposed to air in July 2021, but got delayed to October 6, 2021. An English dubbed version premiered on November 24, 2021 with officially licensed by "Crunchyroll" for streaming to regions outside of Asia.

On September 24 2023, a second season for the anime was announced.

Story
"I'm going to live for myself!"

The greatest assassin on Earth knew only how to live as a tool for his employers—before they decided to eliminate him. Reborn by the grace of a goddess into a world of swords and sorcery, he's offered a chance to do things differently this time around, but there's a catch: He has to eliminate an extremely powerful hero who will destroy the world within eighteen years of his birth. He will have to stop them before that event happens.

Being reincarnated with the name of Lugh Tuatha Dé, the master assassin certainly has his hands full, particularly because of all the beautiful girls constantly surrounding him. Lugh may have been an incomparable killer, but how will he fare against foes with powerful magic?

Music

 * Opening Theme: "Dark seeks light" by Yui Ninomiya
 * Ending Theme: "A Promise" by Aira Yūki

Staff

 * Original Work: Rui Tsukiyo
 * Direction: Masafumi Tamura
 * Series Composition: Katsuhiko Takayama
 * Original Character Design: Reia
 * Character Design: Eri Osada
 * Animation Work: Silver Link, Studio Palette

Japanese

 * Kenji Akabane as "Lugh Tuatha Dé" (Makoto Koichi as "Young Lugh")
 * Reina Ueda as "Dia Vicorne"
 * Shino Shimoji as "Maha"
 * Yuuki Takada as "Tarte"
 * Junpei Morita as "Assassin"
 * Chiaki Takahashi as "Esri Tuatha Dé"
 * Toshiyuki Morikawa as "Cian Tuatha Dé"
 * Yukari Tamura as "Goddess"
 * "Daisuke Masuoka" as "Ronah"
 * Yui Ninomiya as "Noine"
 * Chiyuki Miura as "Ifa (イーファ)"
 * Akane Matsunaga as "Connor (コナー)"
 * Saima Nakano as "Michelle (ミシェル)"
 * Nene Momosuzu as "Kelly"
 * Ayaka Shimizu as "Marquess​ Collide (コライド侯爵)" [Ep01]
 * Mitsuki Nakamura as "Butler" [Ep01]
 * Hiroya Egashira as "Auctioneer" [Ep01]
 * Mika Kanda as "Maia (イア)" [Ep02]
 * Harumi Sakurai as "Margaret (マーガレット)" [Ep03]
 * Emiko Takeuchi as "Shop Assistant" [Ep04]
 * "Yuuka Nanba" as "Maid​" [Ep04]
 * Yoshihito Sasaki as "Rack (ラック)" [Ep05]
 * Yukiko Aruga as "Emma (エマ)" [Ep05]
 * Shin'ya Takahashi as "Pat (パット)" [Ep05]
 * Masashi Nogawa as "Ronah's Father" [Ep05]
 * Junji Tachibana as "Tourist​" [Ep06]
 * Itaru Yamamoto as "Torran (トラン)" [Ep06]
 * Hiroki Matsukawa as "Lloyd (ロイド)" [Ep06]
 * Ryu Morimiya as "Hermel (ハーメル)" [Ep06]
 * Hiroki Yasumoto as "Special Forces Soldier" [Ep04]
 * Tomokazu Sugita as "Samurai" [Ep05]
 * Chie Nakamura as "Claris (クラリス)" [Ep01]
 * Takahiro Sumi as "Command" [Ep01]
 * Takaki Otomari & Takara Inoue as "Border Security Guards" [Ep01]
 * Yurika Moriyama as "Announcer" [Ep01]

English

 * Christian Banas as "Lugh Tuatha Dé"
 * Caitlin Glass as "Dia Vicorne"
 * Hayden Bishop as "Maha"
 * Courtney Lin as "Tarte"
 * Mick Lauer as "Assassin"
 * Veronica Taylor as Goddess