
Quick answer — Hitomi Terakado voices Angelica in Gunslinger Girl, Hanon Houshou in Mermaid Melody: Pichi Pichi Pitch.
Hitomi Terakado voices Angelica (Gunslinger Girl), Hanon Houshou (Mermaid Melody: Pichi Pichi Pitch).
Angelica is voiced in Japanese by Hitomi Terakado.