Simon Koukissa, also credited as Simon Koukissa-Barney, is a French voice actor known for his work in the dubbing of anime and animated series for the French-language market. He has built a career lending his voice to a variety of characters in popular and long-running anime franchises.

His body of work includes significant roles in major series. He voices Tôru Ishikawa in the anime Horimiya and its subsequent series Horimiya: The Missing Pieces. In the world of Demon Slayer: Kimetsu no Yaiba, he is the French voice of the Snake Hashira, Obanai Iguro, a role he has performed in both the Entertainment District Arc and the Mugen Train Arc. He also voices the character Durham in the anthropomorphic drama BEASTARS. Beyond these, Koukissa has taken on leading roles, such as voicing the protagonist Rakurou Hizutome, known in-game as Sunraku, in the adventure series Shangri-La Frontier across its multiple seasons. He also voices the character Shin in the 2025 action series Sakamoto Days.

Koukissa's career also features roles in internationally renowned films, demonstrating a range that spans different animation styles and studios. He provided the French voice for Denzel in Final Fantasy VII: Advent Children, Marco in Studio Ghibli's Howl's Moving Castle, and Flèche in the Pixar film The Incredibles. His filmography indicates recurring collaborations within the French dubbing industry, frequently working alongside other voice actors such as Jim Redler, with whom he has shared credits in both Horimiya and Beastars.