
Quick answer — Shiho Kikuchi voices Mika in Kodocha, Ena Saeki in Full Metal Panic? Fumoffu, Maya Mukai in Full Metal Panic? Fumoffu and 3 more characters.
Shiho Kikuchi voices Mika (Kodocha), Ena Saeki (Full Metal Panic? Fumoffu), Maya Mukai (Full Metal Panic? Fumoffu), Hikaru Amano (Martian Successor Nadesico), Mira Kudan (Full Metal Panic!), Hiromi Tachibana (Beyblade G Revolution).
Mika is voiced in Japanese by Shiho Kikuchi.