
Quick answer — Fuyumi Shiraishi voices Sachi in Tomorrow's Joe, Katz Hawin in Mobile Suit Gundam, Mirai Yashima in Mobile Suit Gundam and 2 more characters.
Fuyumi Shiraishi voices Sachi (Tomorrow's Joe), Katz Hawin (Mobile Suit Gundam), Mirai Yashima (Mobile Suit Gundam), Sunny The Magician (Giant Robo the Animation: The Day the Earth Stood Still), Kasha Imhof (Space Runaway Ideon).
Sachi is voiced in Japanese by Fuyumi Shiraishi.