
Quick answer — Reiko Tajima voices Oscar François de Jarjayes in Lady Oscar: The Rose of Versailles, Emeraldas in Galaxy Express 999, Sandra in Space Adventure Cobra.
Reiko Tajima voices Oscar François de Jarjayes (Lady Oscar: The Rose of Versailles), Emeraldas (Galaxy Express 999), Sandra (Space Adventure Cobra).
Oscar François de Jarjayes is voiced in Japanese by Reiko Tajima.