Gaia Bolognesi is an Italian voice actress and radio personality, born in Rome on March 4, 1980. She comes from a family of voice actors, being the daughter of Rino Bolognesi and the younger sister of Marco Bolognesi. Her career spans a wide range of roles in anime, animated series, and live-action dubbing.

Bolognesi is highly recognized for her work in anime, having voiced several iconic characters. She is the Italian voice of Armin Arlert in the global phenomenon Attack on Titan, a role she has performed across the series' various seasons and compilation films. She also voices Rei Hino, also known as Sailor Mars, in the recent Sailor Moon Crystal series and the film Pretty Guardian Sailor Moon Eternal. Another significant long-term role is Rin Natsuki, or Cure Rouge, in the Pretty Cure franchise, including Yes! Precure 5 and its sequel Yes! Precure 5 GoGo!.

Her extensive anime filmography includes the role of Orika in the fantasy film Over the Sky, Agnes Joubert in Tiger & Bunny 2, and F in the Star Wars: Visions anthology. She has been involved in the Lupin III franchise, voicing Utika in the special Lupin III: Princess of the breeze ~Kakusareta Kūchū Toshi~ and Rebecca Rossellini in Lupin III Italian Game. Other notable credits include Takato Matsuki in Digimon Tamers, Levy McGarden in Fairy Tail, Mirta in Winx Club, and roles across the Battle Spirits series, such as Kenzo Hyodo in Battle Spirits: Brave and Hajime Hinobori in Battle Spirits: Heroes. She also voiced Takeru Amao in Live On Cardliver Kakeru, Memetchi in Tamagotchi the Movie, and Pietro in Popolocrois Monogatari.

In addition to her anime work, Bolognesi has several high-profile recurring roles in Western animation. Since the twenty-third season, she has been the Italian voice of Bart Simpson on The Simpsons. She also voices Vanellope von Schweetz in the Wreck-It Ralph films and has provided voices for characters in series such as DC Super Hero Girls and Justice League Action.

Beyond voice acting, Bolognesi has had a long career as a radio host, serving as an official voice for the Italian radio station m2o from 2002 to 2019. She has also sung Italian theme songs for various animated series, including Via dello Zoo 64 and George Shrinks. Her work in dubbing often involves collaborations with other prominent Italian voice actors, with Paola Majano frequently directing her performances, such as in Live On Cardliver Kakeru.