germany as undyne had come straight to mind XD
for russia we thought maybe he could be flowey due to both of them being obsessed with death, russia being portrayed as being kind and friendly at first but in reality is deadly XD
but who would be alphys?
*le whisper* we had an idea though that asriel could be canada purely due to him being forgotten and such , hard to describe but if you have watched the ending of pacifist route its understandable xD