I'm thinking of much as when she was Emma in MGS2 as when she was Naomi in MGS1. Like she could have Emma's pitch but Naomi's accent, but it might hurt her throat to do that for so long. Emma was something of a bit part in the end after all.

Oh well, since I'm on the subject of MGS voice actors a friend of mine just suggested Kim Mae Guest (Mei Ling; keep in mind she dropped the accent in Twin Snakes and MGS4) might do her some justice.