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Madeleine Joan "Maddie" Blaustein, (born Adam John Blaustein on 9 October 1960, died on 11 December 2008), also credited in various media as Addie Blaustein, Adam S. Blaustein or Madeline Blaustein, was an American voice actress who voiced several characters on the premises of 4Kids Entertainment.
Blaustein was, until her death, the voice of Sartorius in Yu-Gi-Oh! GX. She was also most known as the voices of Meowth in Pokémon (Episode 29 through season 8) and Solomon Muto (Sugoroku Mutou) from Yu-Gi-Oh!. She was also Chef Kawasaki from Kirby: Right Back at Ya!, Doctor Kureha in One Piece, and Arngrim, Lawfer, and Lezard in Valkyrie Profile. She was also a comic book writer and artist, having worked for both Marvel Comics and Milestone Comics, and an animation director. Later, she served as Creative Director for the Weekly World News.
She provided the voice of Margarete in the English version of the PlayStation 2 game Shadow Hearts. Most notable is her great variety of voices. In Valkyrie Profile, for example, she was able to perform a very "tough", deep masculine voice (Arngrim), as well as a high-class one (Lawfer) and a suitable and somewhat androgynous voice of a mad scientist/sorcerer (Lezard Valeth). In Shadow Hearts, Margarete is voiced in a deep, feminine, and seductive style. During the 2004 Democratic Party primaries, she appeared as Sméagol on the Mike Malloy Show, announcing a satirical presidential bid.
Under the pseudonym Kendra Bancroft, Blaustein was one of the content creators in the Second Life platform, where she was a very eager participant since 2004, and earned a reputation as an innovative, competent, and very reliable 3-D modeller in the many communities where she participated. Blaustein was born intersexed. She was assigned male at birth and lived her life as a male for many years before transitioning to female. Her experience as an activist in the transgender community helped her to organize and support groups of people in Second Life.
On 11 December 2008, Blaustein died in her sleep from a short illness, at the age of 48. Rumors say her death was caused by food poisoning.