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 anime is directed by Masafumi Tamura at Silver Link & Studio Palette.

It was was originally supposed to air in July 2021, but got delayed to October 6, 2021.

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

The greatest assassin on Earth knew only how to live as a tool for his employers—until they stopped letting him live. 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 a super-powerful hero who will bring about the end of the world unless he is stopped.

Now known as Lugh Tuatha Dé, the master assassin certainly has his hands full, particularly because of all the beautiful girls who constantly surround 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

Characters

 * Kenji Akabane as Lugh Tuatha Dé
 * Reina Ueda as Dia Vicorne
 * Yuuki Takada as Talt
 * Shino Shimoji as Macha