User blog comment:Luna Terra/The Narrator of Hetalia (Anime)/@comment-1861649-20101027021329

Basically everything that Watermint said.

As for the familiar voice in the English dub, I'm pretty sure she played Keiko in the Yu Yu Hakusho dub. (So it's hard for me to UN-HEAR her XD I keep imagining a sweet mousey character saying strange things..or she'd slap Yusuke at any minute. /rambling)

Not sure about the Japanese narrator but I'm pretty sure she plays multiple characters.