Welcome to Anime Vice! It's sad for Natsu and Lisanna fans because Hiro Mashima didn't change the story when his editor or director had Lisanna come back from Edolas. Maybe, we'll see some filler episodes or OVAs on these two. When I first watch episode 20 about Happy's origin and found out about Lisanna's dead, I was sad. When she was still alive, it's a shame that she never get any spotlight. Here's to hoping that Fairy Tail expand on these two's relationship.