I can imagine how Hetalia characters would react to a double rainbow: Italy: OH MY GOD, look Germany! What does it mean?! Germany: I....don't know. (Nor do I care) America: Double rainbow all the way across the sky~~ England: What the h**l are you singing?! China: *cries in Japans lap* Japan: Why are you.....? Romano: What the f***? Is that a f***ing double rainbow?