Harry Potter was tired of being hounded by rabid fans in Diagon Alley, so he got a hat to cover his scar, the one thing that a glamour didn’t work on. He actually really liked the hats and started getting more designs, even pairing them with some new glasses. On top of that he could enchant them with some cool charms. Soon enough, he had a whole wall dedicated to his hats (a magically expanded wall that is) and was always on the hunt for more.
Fleur liked berets. She thought they were ingenious and made her look cute. What, you thought she went to Beauxbatons for enchanting? No, she went because berets were part of the uniform. One day while shopping for a new beret she came across an old friend.