
Quick answer — Kikumi Umeda voices Denpa in Den-noh Coil, Mother Midorikawa in Listen to Me, Girls. I Am Your Father!, Qoo in Tweeny Witches.
Kikumi Umeda voices Denpa (Den-noh Coil), Mother Midorikawa (Listen to Me, Girls. I Am Your Father!), Qoo (Tweeny Witches).
Denpa is voiced in Japanese by Kikumi Umeda.