User blog comment:Miskos3/Fairy Tail Chapter 490: Fairy Tail Zerø, Review/@comment-75.175.98.152-20160622053122/@comment-7418318-20160622064147

Heart Kreuz is both Lucy's and Erza's favourite brand. And it's also a callback to Hiro Mashima's previous work Rave Master, where Heart Kreuz was also Elie's favourite brand.