Ikkei Seta is a Japanese actor and voice actor who is the president and a member of the talent agency Gin Production. He was previously a member of the theater companies Gekidan Asunaro and Gekidan Tokyo Renaissance, and was a founding member of Gekidan Gin Pro. Seta was born on June 16, 1965, in Tokyo, Japan. He stands 172cm tall and weighs 81kg. On May 1, 1998, he changed the kanji used in his given name from 一恵 to 壱恵, though the pronunciation remained the same. His hobbies and special skills include rakugo storytelling, water polo, building models, and he holds a certificate in gas welding training.

Seta is known for his voice roles in the Digimon media franchise. He provided the voice for several characters in the series Digimon Tamers, including the powerful and feral Ultimate-level Digimon Cyberdramon, its Mega-level evolved form Justimon, and the antagonist Sandiramon. In the 2002 anime film Digimon Tamers: Runaway Locomon, he reprised his role as the voice of Cyberdramon. Beyond the Digimon Tamers series, Seta also performed the song DoD as a vocalist and the image song Fighting Soul for the franchise.

His other significant anime voice credits include the roles of Crepy Rocksmith, the soba shop owner, the street lamp, and others in Fushigi Mahou Fun Fun Pharmacy, a reporter in White Album, Naitou and the autopsy doctor Meller in Silent Mobius, the president and a butler in Kamikaze Kaitou Jeanne, the character Lekakis in Strange Dawn, and Mugenya in Desert Punk. He also played a cat thief in Rozen Maiden: Traumend, an elderly man and a shopkeeper in Ashita no Nadja, a teacher in Kocchi Muite Miiko, and a villager in the television mini-series adaptation of Kon.