George referred to the Marauder’s Map a lot.
He had always hoped to see footsteps with Fred’s name hover over them. It never happened, but yet he still looked. He could never lose that hope. Not when it was invested in Fred. It was the hope that maybe he’d been pranked (“Good one, Freddie! Never do it again. Please.”) or maybe that Fred came back as a ghost (“Look, Georgie! I’m floaty! HOLEY AND FLOATY!”). And yet…
When Fred II went to Hogwarts, he would get those hopes up easily. All he could see was FRED WEASLEY wandering around. It would all crash down when he saw that ‘II’.