Colleen O'Shaughnessey is an American voice actress known for her extensive work in anime dubs, animated series, and video games. Born on September 15, 1971, in Grand Rapids, Michigan, she developed an interest in acting during high school and went on to earn a Bachelor of Fine Arts degree in musical theatre from the University of Michigan. She began her voice acting career in the early 1990s and has since accumulated hundreds of credits.

O'Shaughnessey's entry into anime voice work came with one of her first major roles, providing the English voice of Sora Takenouchi in the popular series Digimon: Digital Monsters. This character became a signature role, which she has reprised numerous times over the years, including in the film Digimon Adventure: Last Evolution Kizuna and the Digimon Adventure tri. movie series. This early success led to a steady stream of work in the industry.

She became a recurring presence in several long-running and high-profile anime franchises. In the Naruto series, she voices multiple characters, most notably Ino Yamanaka and Konohamaru Sarutobi, roles she has continued in sequels like Boruto: Naruto Next Generations. Her work in the franchise also extends to films such as The Last: Naruto the Movie. Similarly, in the long-running series Bleach, she is known for voicing the character Nelliel Tu Odelschwanck.

Beyond these long-term roles, her filmography demonstrates versatility across a wide range of anime series. She has taken on leading and supporting parts in numerous shows, including the role of Reina in Didn't I Say to Make My Abilities Average in the Next Life?!, Vanabelle in Drifting Dragons, Praline in Somali and the Forest Spirit, and Suzuki in Okko's Inn. She also voiced Mary Hunt in the popular series My Next Life as a Villainess: All Routes Lead to Doom! and its sequel. Her work also includes roles in The Orbital Children as Hiroshi Tanegashima, Kabaneri of the Iron Fortress: The Battle of Unato as Kajika, and Anna Kushina in K: Missing Kings. In the K series, she also voiced Sakura Asama and Claudia Weissman. Other notable anime credits include Sayla Mass in Mobile Suit Gundam: Cucuruz Doan's Island, Kijimuna in Stitch!, and Kelsey, also known as Glitter Sunny, in Glitter Force.

While her anime work is extensive, O'Shaughnessey is also widely recognized for her roles in Western animation and video games. A defining role in her career has been Miles "Tails" Prower in the Sonic the Hedgehog franchise. She began voicing the character in the Sonic Boom TV series in 2014 and has continued in numerous video games. In a landmark moment for voice actors in film, she reprised the role for the live-action/CGI hybrid Sonic the Hedgehog films, appearing in Sonic the Hedgehog, Sonic the Hedgehog 2, and Sonic the Hedgehog 3. Other prominent animation roles include Jazz Fenton in Danny Phantom and Wasp in The Avengers: Earth's Mightiest Heroes. In the Marvel universe, she has also voiced the character Friday in Marvel Future Avengers and the Wasp in Marvel Disk Wars: The Avengers.

Her voice is also prominent in the video game industry, where she has voiced characters such as KOS-MOS in Xenosaga Episode II, Genis Sage in Tales of Symphonia, the female Asura in Guild Wars 2, Kronya in Fire Emblem: Three Houses, and numerous characters in the Fallout and Hitman franchises. Her work spans a variety of genres, demonstrating her adaptability and extensive range as a performer. With a career spanning over three decades, Colleen O'Shaughnessey has become a familiar and respected voice in animation and gaming, known for her longevity and for bringing consistency to beloved characters across different media.