Martel Frasier Tremain is a pseudonym used by the French-born American voice actor, ADR director, and script writer Michael Sinterniklaas. Born on August 13, 1972 in Nice, France, he is the founder and owner of NYAV Post, a bi-coastal recording studio with locations in New York City and Los Angeles that has produced English-language dubs for hundreds of anime titles. In addition to performing, he has worked as a voice director on numerous series, including Berserk, Slayers Revolution, and Mobile Suit Gundam Unicorn.

As a performer, Tremain is best known for providing the English voice for the character Yuki Washimura in the anime series B-Daman CrossFire. The show, which originally aired in Japan starting in 2011, features Yuki as a friendly, bespectacled twelve-year-old boy known for his hearty appetite. Tremain is credited for this role in the English-language version of the series, which also appeared in its sequel, Cross Fight B-Daman eS.

Beyond this specific role, Tremain has a long and varied career in animation. He is recognized by audiences for major roles such as the voice of Leonardo in the 2003 Teenage Mutant Ninja Turtles series and Dean Venture in The Venture Bros. His other anime and cartoon credits include Taki Tachibana in the acclaimed film Your Name, Mikey Simon in Kappa Mikey, Riven in Winx Club, and Funshine Bear in Care Bears: Welcome to Care-a-Lot. In video games, he has contributed to various titles.

A significant figure in the industry, Tremain has worked with many major dubbing studios, including Funimation, 4Kids Entertainment, Viz Media, and Bandai Entertainment. His achievements include leading his own studio, NYAV Post, to become a prominent producer of anime dubs and voicing the lead in one of the highest-grossing Japanese anime films of all time, Your Name. He is also known under other alternate names, including Martel Fraiser Tremain, Michael Tremain, and Christopher Stalken.