Honna Youko (from her website)
Youko Honna (本名 陽子 Honna Yōko, born January 7, 1979 in Sōka, Saitama.) is a Japanese Voice Actress who does the voice of Atomic Betty/Betty Barrett in both the Original Atomic Betty Japanese Dub and the crossover series, Atomic Betty X Total Drama. She also voices Sumeragi Lee Noriega in Mobile Suit Gundam 00, Nagisa Misumi in Pretty Cure and Saki Omokane in Tatsunoko vs. Capcom: Ultimate All Stars.
She plays Atomic Betty in the Japanese dub of Atomic Betty X Total Drama, as well as Harmony Unleashed: Human Ponidox Continuum Shift (she also does Diamond Tiara) and Transformers: Unicron Chronicles.