Ai Horanai is a Japanese voice actress from Aomori Prefecture, born on April 24, 1982. She is affiliated with the talent agency B-Box and began her career in the early 2000s after graduating from the B-Box Actors School. Her voice is often described as energetic and lively, and she is particularly known for her portrayals of young boys and quirky supporting characters.

Horanai has built a substantial body of work across television anime, original video animations, video games, and theater productions. Her filmography spans over two decades, with one of her earliest roles being a young boy in the series Naruto in 2002. She gained wider recognition for her role as Rua, the lively twin brother also known as Leo, in the popular series Yu-Gi-Oh! 5D's.

In the Battle Spirits franchise, Horanai has a recurring role as the character Zungurii. She voiced this cheerful, monkey-like boy in both Battle Spirits: Shōnen Gekiha Dan, which began airing in 2009, and its sequel series, Battle Spirits: Saga Brave, which aired in 2019. Her involvement with the franchise highlights a recurring collaboration with the Battle Spirits series.

Other notable roles in her career include Saki Kinomiya in Wake Up, Girls!, Mami Nagawa in the 2024 series A Salad Bowl of Eccentrics, and Belo in the 2006 version of Humanoid Monster Bem. She also voiced a young version of the character Baron in The Law of Ueki.

Throughout her career, Horanai has demonstrated versatility, taking on roles in various media and performing character songs for series like Wake Up, Girls!. A significant influence on her decision to become a voice actress was Kazuhiko Inoue, with whom she later had the opportunity to work on Humanoid Monster Bem. Her connection with her audience is fostered through her blog, where she has shared personal milestones with her fans.