Kari Wahlgren is an American voice actress known for a extensive body of work in English-language dubs of anime, as well as in Western animated series and video games. Born on July 13, 1977, in Hoisington, Kansas, she developed an early interest in voice performance, inspired by the voices of Disney characters. She graduated from the University of Kansas with a Bachelor of Arts in Theater in 1999 before moving to Los Angeles in 2000 to pursue an acting career. Transitioning from on-camera work to voice-over, her training in dialogue and Shakespeare proved instrumental in her ability to take on a wide variety of roles.

Wahlgren's debut in anime came with the role of the energetic and unpredictable Haruko Haruhara in the cult classic series FLCL. This performance launched a prolific career in the industry. She quickly became a prominent voice in many high-profile dubs, often taking on lead and supporting roles. Her credits include the title character Robin Sena in Witch Hunter Robin, Lavie Head in Last Exile, and Fuu Kasumi in Samurai Champloo. In the fantasy series Scrapped Princess, she voiced the titular Pacifica Casull, and in the action series Eureka Seven, she took on the role of Anemone. Her versatility is further demonstrated by her work as the dual characters Saya and Diva in Blood+, and as Kagami Hiiragi in the popular comedy Lucky Star.

Wahlgren has also been the English voice for several iconic and recurring characters across major franchises. She is well-known for portraying Celty Sturluson, the headless dullahan, in the Durarara!! series. In the expansive Fate franchise, she has voiced multiple iterations of the character Saber, also known as Altria Pendragon, including her appearances in Fate/Zero, Fate/stay night: Unlimited Blade Works, and the Heaven's Feel film trilogy. She has also voiced related characters like Saber Alter and the Lion King in Fate/Grand Order adaptations. Her role as Dee Eye Ell in Sword Art Online: Alicization - War of Underworld and as Karina Lyle, the superhero Blue Rose, in Tiger & Bunny 2 are further examples of her significant presence in modern anime. In the film Promare and its related shorts, she voiced the character Lucia Fex.

Beyond the titles listed by the user, her anime filmography includes characters like Rip van Winkle in Hellsing Ultimate, Tsuruya and Kyon's Sister in various installments of The Melancholy of Haruhi Suzumiya franchise, and Luca in Immortal Grand Prix. She also voiced roles in projects such as A Little Snow Fairy Sugar, Yukikaze, and Marvel anime adaptations like Iron Man: Rise of Technovore and Marvel Future Avengers, where she voiced characters like Wasp and Enchantress.

In addition to her anime work, Wahlgren has a robust career in Western animation and video games. She has voiced Tigress in Kung Fu Panda: Legends of Awesomeness, Charmcaster in the Ben 10 franchise, and Jessica in Rick and Morty. Her video game credits include leading roles such as Ashe in Final Fantasy XII, Raine Sage in Tales of Symphonia, and Mileena and Kitana in the Mortal Kombat series. Wahlgren's contributions to the field have been recognized with critical praise and awards. She was named Voice Actress of the Year by Behind the Voice Actors in 2012 and received a Children's and Family Emmy Award in 2023 for Outstanding Voice Performer in a Preschool Animated Program for her work on the series SuperKitties.