A good fairy of Arendelle suddenly had to send a message to one of the kingdom’s prominent dwellers. She created a magical Envelop, wrote a dedicated Letter and sealed them both with a wizard Stamp. She folded them altogether into a… paper plane and launched as if it was an Air mail delivery. With a bit of magic the message should find its addressee quite soon.
But who was the mysterious addressee?
The first letters of the 4 main objects mentioned in the riddle and starting with capitalized letters give the name of the mysterious addressee which is Princess ELSA.