
Quick answer — Reika Uyama voices Birk in Ronja, the Robber's Daughter, Kumi in ERASED, Muru in LUPIN THE 3rd PART 6 and 1 more characters.
Reika Uyama voices Birk (Ronja, the Robber's Daughter), Kumi (ERASED), Muru (LUPIN THE 3rd PART 6), Chihiro Sakai (Cheer Boys!!).
Birk is voiced in Japanese by Reika Uyama.