Sebastian Arcelus is an American actor born in New York City on November 5, 1976, who has built a career spanning voice acting for anime, live-action television, and Broadway theatre. He began providing voices for English adaptations of anime in the early 2000s, with his work in the 2004 theatrical film Yu-Gi-Oh!: The Movie marking an entry point into the field. His voice acting is closely associated with the output of New York-based studios like 4Kids Entertainment and NYAV Post during an era when many anime series were localized for American audiences.

Arcelus is known for several prominent anime roles. He voiced the protagonist Yoh Asakura in the English adaptation of Shaman King, as well as the character Hao Asakura, also known as Zeke. He played the dual role of the young dinosaur expert Rex Owen in both the first season and Dinosaur King Season 2. Another significant performance was as Tadahiro Amatsu in the supernatural series Shrine of the Morning Mist, a dub produced by NYAV Post. His work also extends to the Pokémon franchise, where he voiced the character Vincent in the special Pocket Monster Crystal: Raikou Ikazuchi no Densetsu (The Legend of Thunder!) and Rafe in the seventh film, Pokémon: Destiny Deoxys.

His voice acting career includes a wide range of other credits. He has been featured in multiple iterations of the Yu-Gi-Oh! franchise, providing voices for characters such as Espa Roba, Marcel, and Lazar across Yu-Gi-Oh! Duel Monsters, Yu-Gi-Oh! GX, and Yu-Gi-Oh! 5D's. He is also credited in series like The Gokusen, Midori Days, Samurai Deeper Kyo, and Ultimate Muscle. In addition to anime, he has voiced characters in related media, including the role of Raphael in the animated film Teenage Mutant Ninja Turtles: Turtles Forever and as Timmy in the Winx Club animated series.

Throughout his voice acting career, Arcelus has frequently collaborated with a consistent group of fellow New York-based voice actors. He has worked alongside performers such as Dan Green, Veronica Taylor, Rachael Lillis, and Wayne Grayson on numerous projects, including Shaman King, the various Yu-Gi-Oh! series, and Dinosaur King. This period of voice work ran parallel to his established career as a stage actor, where he has appeared in Broadway musicals such as Rent, Wicked, and Elf.