Swan Demarsan is a French actor whose professional work encompasses theatre, film, television, and voice acting. His career in performance spans several decades, with on-screen credits dating back to 1988. In addition to his work in front of the camera, Demarsan is also active as a stage director and acting coach.

As a voice actor, Demarsan is active in dubbing for French-language versions of international productions. His voice work includes roles for content distributed on major streaming platforms such as Netflix, Disney+, and Crunchyroll. One of his confirmed roles in animation is Ludo Chevalier in the French dub of the anime series Lucifer and the Biscuit Hammer, which was produced by Crunchyroll Production France.

Beyond voice acting, Demarsan has built a substantial career in French cinema and television. His filmography includes a role in the 2008 film MR 73 and appearances in television series such as Signature, Le Bazar de la charité, and Une Affaire Française. He is also deeply involved in Parisian theatre, having both performed in and directed several stage productions, including the play Désordres, which he also directed.