Do You Believe in Ghosts

"We still haven't figured out who Ghost is." Rose said. "And we're not getting anywhere." "Wait!" Lily paused. "Didn't Ghost say she was in the same year as Dad, Uncle Ron, and Aunt Hermione?" "Yyeess." Fred sang. "If she was in their year, wouldn't Professor Longbottom recognise her?" Lily continued. Lucy nodded, seeing where her cousin was going with this.