Natsu’s breakdown was very good for his character development, I think, considering that he’s only ever broken down like this when he fought Gildarts. But this was different.
Natsu, ever cheerful Natsu, crawled his way to Future Lucy’s body with his fresh wounds. He was so choked up that he was shaking. The only thing he could sob out was Lucy’s name and some unintelligible sounds. I don’t know about you guys, but seeing Natsu hunched over and sobbing over the dead body of the girl he loves, gives me chills. It might not have been romantic love in this situation yeah, but the bond they have speaks for itself.
Natsu said he would defeat Future Rogue, but by the way he reacted to Future’s Lucy’s death, I wouldn’t be surprised if Natsu tried to put Future Rogue six feet under. And that’s just not like Natsu to want to kill someone. It would take something like an emotional breakdown for Natsu’s mentality to change like that.
And an unstable Natsu is friggin’ scary.