Peggy O'Neal got her start in voice acting when she was first seen in three episodes of seaQuest DSV and then went on to do ADR on Dawson's Creek, Dark Skies, Walker, Texas Ranger. Then she took on a voice acting class where she was taught by Susan Blu leading up to her anime roles upon her classmate being the girlfriend of Saban worker Paul Di Franco who did all of the casting for the Saban Entertainment shows. During her work on Saban Entertainment's shows, Peggy considered her Shinzo character Yakumo Tatsuro as a big break for her. Some of her anime projects had her playing the sister of some of Dave Wittenberg's characters while also mentioning that some of her characters would often be the love interests for Steven Blum and Crispin Freeman's characters.
When not doing voice acting, Peggy works as a part-time teacher at Moorpark College where she teaches acting to her students.
Battle B-Daman - Liena Vincent
Code Geass: Lelouch of the Rebellion - Dorothea Ernst (Ep. 22), Ayame Futaba
Digimon Adventure 02 - Jun Motomiya, Mrs. Inoue
Digimon Tamers - Suzie Wong, Tally
Digimon Frontier - Ranamon/Calmaramon, Kid Kokuwamon (Ep. 5), Burgermon, Poyomon
Dinozaurs - Princess Helen (Ep. 17)
Duel Masters - Sayuki (Season 2)
Eureka Seven - Maeter, Diane Thurston, Maria Schneider, Nirvash (Ep. 50)
Flint the Time Detective - Additional Voices
Ghost in the Shell: Stand Alone Complex - Jeri (Ep. 3), Tachikoma, Motoko Kusanagi (Young)
Ghost Slayers Ayashi - Oiran (Ep. 13)
Kikaider - Rieko
Lucky ☆ Star - Miki Hiiragi, Ayano Minegishi, Ichiko (Ep. 13)
Mars Daybreak - Maki
Planetes - Ex-Wife
Scrapped Princess - Elfitine
Shinzo - Yakumo Tatsuro
Tenchi Muyo! Ryo-Ohki (OVA 3) - Tennyo Masaki
Wolf's Rain - Harmona
Fortune Hunter - Iris Cunningham (in "Hot Ice")
Full House - Waitress (in "The House Meets the Mouse" Pt. 1)
Power Rangers: Wild Force - Voice of Wedding Dress Org
seaQuest DSV - Anita (in "When We Dead Awaken"), Dr. Kaufman (in "Something in the Air"), Dr. Johansen (in "Equilibrium")
Second Noah - Sheila (in "Hoops and Dreams")
Superboy - Azrael (in "Into the Mystery"), Wife (in "Wish for Armageddon")
Super Force - Mariah Black (in "Monkey's Breath" and "A Hundred Years in a Second")
Swamp Thing: The Series - Katherine (in "Vendetta")
The Mystery Files of Shelby Woo - Ramona Finleu (in "The Missing Dolphin")
China Moon - Miami Desk Clerk
Digimon: The Movie (2000) - Botamon
Digimon Tamers: Battle of Adventurers – Suzie Wong
Digimon Tamers: Runaway Locomotion – Suzie Wong
Psycho IV: The Beginning - Nurse
Seven Sundays - Geraldine
The Flock - Walla Group (voice)
Ghost Rider - Roxanne Simpson
Saints Row IV - Virtual Steelport Voices
Saints Row: The Third - Pedestrian and Character Voices
Supreme Commander - Additional Voices