Seow Ting inspired me to do this during the bus trip of doom! to the Sg Art Museum today~
Actually, ignore the ~ cos some of the below information is SCARY.
PRESENTING TO YOU~~~
-insert seiyuu's name- also voices -character's name- from another anime~!
All info is from Wiki!

Seiyuu: Daisuke Namikawa (Romano and Italy)
Also voices: Ulquiorra Cifer (BLEACH) OMG WHUUT
Michael Trinity (Mobile Suit Gundam 00) O_O
Giotto (Katekyo Hitman Reborn!) This made me faint. -insert mental recording of Italy saying, "Doitsu~! Doitsu~!"- -inserts mental recording of Giotto-san's ultra cool voice- A WORLD OF DIFFERENCE!!!!!!
Fay D. Flourite (Tsubasa Reservior Chronicles)
SCARY!!!


Seiyuu: Hiroki Yasumoto (Germany)
Also voices: Agni (Kuroshitsuji) SERIOUS?!!!
Seems like that's all we know for Germany. Hmm.


Seiyuu: Hiroki Takahashi (Japan)
Also voices: Stephen Loud/Stephen Gevanni (Death Note) Uhh... who? Fissssh~~
Superbi Squalo (Katekyo Hitman Reborn!) WWWWWWWWHAAAAAAAAAAAAAAAAAAAAATSSSSSSSQUALO-SAN?!!!!!!!!! BBBBBBBBBUT! -turns on Requim no Ame- OMG?!!!!!!!!!


Seiyuu: Katsuyuki Konishi (America and Canada)
Also voices: Asano Keigo and Shuhei Hisagi (BLEACH) HUUUUH?!!!!
Komui Lee (D.Gray-man) -insert shocked beyong belief face-
Ash, Jupiter(anime only char), Boss (MAR) O__________O;
Johann Trinity (Mobile Suit Gundam 00) WHUT THAT MEANS HE AND ITALY'S SEIYUU--!!
Raven (Pandora Hearts) O____O WHAAAAAAAAT


Seiyuu: Noriaki Sugiyama (England)
Also voices: Uryu Ishida (BLEACH)
Uchiha Sasu-beep!- (Naruto) HENG SEOW TING WHY ARE YOU RIGHT ABOUT THESE 3 CHARACTERS WHYYYYYYYY


Seiyuu: Onosaka Masaya (France)
Also voices: Shinji Hirako (BLEACH) HUUUUUUUH?!!!!!
Nanashi (MAR) WWWWWWWHAAAAAAAAAATTTTTT NNNNNNANASHIIIII?!!!!!!!


Seiyuu: Yuki Kaida (China) OMG PEARL YOU'RE RIGHT CHINA'S SEIYUU IS A GIRL!! T_T
Also voices: No one anyone else knows. That's kinda boring. But why is my fav char's seiyuu a GIRL TT_______TT


Seiyuu: Yasuhiro Takato (Russia)
Also voices: Gluttony (Full-metal Alchemist) ... Russia and Gluttony... You're KIDDING!!!
No one else we know. Buuu. >3>

That's all for now I suppose... Cos Wiki doesn't have anymore characters.
But SCARY HUH?!!!
So yeah let's leave it at here for now.
ALL PEOPLES WHO HAVE YET TO READ/WATCH HETALIA
GOGOGO NOW :D