So I'm writting a new story and have currently only finished 3 chapters, my initial plan was to complete the story BEFORE publishing it to and then Archive of our own but I'm impatient so, haha! That ain't happening. Anyway, before you begin here is a list if characters used in this fanfiction in Register order as well as their gender as well as what country they represent.
Natalya Alfroskya, Female(F), Belarus
Sadiq Adnan, Male(M), Turkey
Lukas Bondevik, M, Norway
Francis Bonnefoy, M, France
Ivan Braginsky, M, Russia
Irunya Cherrenko, F, Ukraine
Mikkel Densen, M, Denmark
Roderich Edelstein, M, Austria
Antonio Fernandez-Carriedo, M
Raelyn Galante, F, Latvia
Elizaveta Hédérváry, F, Hungary
Kiku Honda, M, Japan
Alfred F. Jones, M, America
Heracles Karupsi, M, Greece
Alice (Pronounce "Alis") Kirkland,F, England
Peter Kirkland, M, Sealand
Tolys Loriantis, M, Lithuania
Feliks Łukaszewicz, M, Poland
Tino Väinämöinen/"Lummineinen",M, Finland
Berwald Öxensteirna/"Mårtensson,M, Sweden
Gupta Muhummad Hassen, M, Egypt
Elín Steillson, F, Iceland
Alice (Pronounce"Aliche") Vargas, F, North Italy
Lovino Vargas, M, South Italy
Erika Vogel, F, Liechtenstein
Eduard Von Bock, M, Estonia
Jia Long Wang, M, Hong Kong
Ya Wang, F, China
Gilbert Weillschmidt, M, Prussia
Matthew Williams, M, Canada
Lin Yi Ling, F, Taiwan
Im Yong Soo, M, South Korea
Vash Zwingli, M, Switzerland
Ludwig, M, Germany
I've written their human names based on what I've researched on their human names. Also, I randomly gender bent 10 characters AFTER planning their background based on whether gender-bending them will effect their back story or not; that is why some pairings will be hetero and most will not be.
Furthermore, I haven't included characters that I don't know anything about or have no confirmed/possible names. Also, Ludwig has no last name i think he was given Weillschmidt by the fandom because he is brothers with Prussia