Estonia/Finland is an uncommon pairing that involves the characters Estonia and Finland. It is also known as EstFin, though uncommon to address this pairing with this name.
Finland is the only Nordic nation to feel obviously positive about Estonia's desire to be a part of the Nordics, despite being a part of the Baltics. Though Estonia is a Baltic state in a geographical sense, he is a Nordic ethnically or linguistically. But this appear unknown to the West world ever since Estonia lost his independence during World War II.
The closest Nordic to have similarities with him is Finland, accurately shown in the most used Uralic Language in their lands.