Butterflies are beautiful.
Many people feel beautiful when they see butterflies flying in pairs, but do you know? The butterfly will die soon after exposure. So when you see butterflies flying in pairs, don't think it's wonderful. In fact, it's a very sad scene.
Legend has it that there is a kind of butterfly called ice butterfly, which has a blue color.
You won't see ice butterflies flying in pairs because they don't fly, and therefore they don't die as quickly.
Are there ice butterflies in the world? I don't know, I would rather believe that there is, I would rather believe that there are such beautiful but cold elves in the world.