She laughs when Harry mentions the rollercoaster. She tried that out earlier herself, before occupying herself with the arcade (since she didn't know what a chocobo was at all, nor was she good for the battle arena, and event square wasn't holding a play when she was there). "There's a gondola here? I didn't know. Let's check it out!" Guess that was what "Round" square really meant.

Lisa sort of hugs Harry's arm now, sort of pulling him along as she starts for the strange...graveyard that served as a transportation system.

She lets go though, so they can go through the weird tube system to the Round Square.