He led a party of warlocks into the marquee as Luna rushed up.
“Hello, Harry!” she said.
“Er — my name’s Barny,” said Harry, flummoxed.
“Oh, have you changed that too?” she asked brightly.
“How did you know —?”
“Oh, just your expression,” she said.
Like her father, Luna was wearing bright yellow robes, which she had accessories with a large sunflower in her hair. Once you got over the brightness of it all, the general effect was quite pleasant. At least there were no radishes dangling from her ears.

Harry Potter and the Deathly Hallows – J.K. Rowling