Juan Alfonso Carralero is a Mexican voice actor with a prolific career in Latin American dubbing, particularly renowned for his work in anime. Born on February 11, 1957, in Mexico City, he studied acting for three years at the school of the Asociación Nacional de Actores (ANDA). His entry into the world of dubbing came through an invitation from actor Francisco Colmenero, following his participation in theater and radio dramas. Between 1978 and 1988, he resided in Los Angeles, where he also worked extensively in dubbing. Carralero emphasizes that his background in acting is fundamental to his dubbing work, stating that it is not just about doing voices but about feeling the character.

Carralero is most widely recognized by anime fans as the definitive voice of Daisuke Jigen, the sharp-shooting partner of Arsène Lupin III, for numerous productions in Latin America. He voiced the character in a long list of films and television specials, including "Lupin III: Dragon of Doom," "Lupin III: Island of Assassins," "Lupin III: Crisis in Tokyo," "Lupin III: Farewell to Nostradamus," "Lupin III: The Pursuit of Harimao's Treasure," "Lupin the 3rd: The Hemingway Papers," "Lupin the 3rd: From Siberia with Love," "Lupin the 3rd: Bye Bye, Lady Liberty," and "Lupin III: Voyage to Danger". His portrayal of Jigen also extends to the movies "Lupin III: The Mystery of Mamo" and "Lupin III: The Castle of Cagliostro," the latter being part of a Mexican dub produced between 2001 and 2003.

Beyond the world of Lupin III, Carralero has voiced other iconic anime characters. He played the lead role of Koji Kabuto in the latter part of the classic mecha series "Mazinger Z". His debut role in anime was as the protagonist Kamui in "Ninpu Kamui Gaiden". His extensive filmography includes a wide variety of characters, such as Hideki in "Kick no Oni," Tony Bronson in "Arrow Emblem Grand Prix no Taka," a P.E. Teacher in "Mirmo Zibang!," Juuzo Numa in "Sukeban Deka," Takateru Suga in "Suikoden Demon Century," and Alex / Shin Himoto in "Uchu Kubo Blue Noah". In more recent years, he voiced Don Valentino, a half-goat crime boss, in the 2021 Mexican dub of "Cuticle Detective Inaba". His talent also encompasses roles in popular series like Mayuri Kurotsuchi in "Bleach" and Harbinger de Tauro in "Saint Seiya Omega".

In addition to his on-screen voice work, Carralero has contributed to the industry as a dubbing director. His directing credits include the Mexican dubs for several Studio Ghibli films such as "Castle in the Sky," "My Neighbor Totoro" (2010 redub), "Nausicaä of the Valley of the Wind," and "Princess Mononoke" (2010 redub). He also provides narration and voices characters in these productions. Currently, he is active as an academic director and voice acting instructor, sharing his expertise at schools like Aftermoon Films and Magic Voices, where he advises aspiring voice actors to focus on acting as the primary foundation for a career in dubbing.