Twilight thought it would be a brilliant idea to study with Rarity. Of course, it would probably be better if Rarity wasn't her girlfriend and wasn't more interested in studying Twilight rather than flash cards.
After Rarity finds Twilight's fake crown, Twilight realises that decorating the Hearth's Warming Eve tree is a rather difficult task when Rarity is too busy pretending she's a princess to do any decorating.
Ever since moving into the castle, Twilight has felt like she has been missing something. A visit from Luna only reinforces her theory on what she is missing.
Rarity liked the tale of The Four Princesses as a filly, even if she knew it wasn't real. Princesses fighting against a spirit of chaos? A library under a tree? Please. But then she grew up and found out some bedtimes stories were quite real.
If Twilight had learned something from her relationship with Rarity, it was that even if she was hopelessly in love with the other unicorn, she wanted Rarity to fulfill her dreams -- even if it meant sacrificing their relationship.
After a recently thwarted assassination attempt against Rarity, Twilight and Rarity discuss the soldier's uncertain future as the queen's private bodyguard.
Queen Rarity constantly rejected the advances of other noble ponies - after all, her bodyguard Twilight was already her secret special somepony. Unfortunately for them both, Sweetie Belle is intent on finding out who is her sister's secret crush
Twilight Sparkle received a strange note in the mail. There was no doubt that it was Rarity who had penned the curvy script gracing the letter, but the riddle that lay tauntingly alongside her greeting was quite the mystery. Twilight loved mysteries.
For Twilight, the increased lifespan that came with princesshood had forced her to outlive her friends, but thanks to Rarity, she will learn that centuries could be lived in but a single day.
Twilight has had a crush on Rarity for so long. She's hiding it, so Rarity won't find out. But, Rarity has known. She can see the little signs. She can read Twilight like one of those books she's always reading.