"Ha! You’re not going to be, ugh, consuming anypony! Twilight has probably already sent word to the Princesses. Any second now, she and her brother will come crashing through that wall with dozens of Royal Guards!” 

Context: After she and the girls have been kidnapped, the killer lay out his horrifying plans for them. Rarity is confidently telling him that he will fail.

"Wah-ha-ha! Oh, Rainbow, you have no idea how long I've been waiting for this! Everypony has known this was coming for ages! We were just waiting for Macintosh to finally work up the nerve to ask." 

Context: In the final chapter, Rarity learns that Rainbow Dash and Big Macintosh are getting married.

“Oh, and you simply must let me know who the Mare of Honor will be so I can make the proper ensemble. And then you must tell me what you think of the designs I have for foal clothes! I did think it a bit premature, but knowing what we know now, I dare say I was ahead of the curb. Oh, won’t it be marvelous? Little rainbow-maned earth ponies, crimson pegasi, or maybe e—” 

Context: As above, Rarity has gone full fashionista.