@Sekel @Blitz Boom
Magnolia was with Zeehva at the moment but she had turned to look to see her sister standing there. Some other ponies were here, but she wasn't going to pass this chance up. Pulling away from Zeehva, she'd take a bold prominent stance in front of her younger sister. Her stature, the way she looked and presented herself was of the Sparkle Family. An imposter wouldn't have that - yet she did. She were the real deal.
"Ah, so it seems you finally read your mail, Twilight. My real name is Moonlight Sparkle, I am your older sister by around 10 years if my memory serves me correctly. For all of your travels, journeys and lessons you find yourself here, in the realm of death, so rarely understood by others. I have spent years trying to contact you. I don't know why I didn't just come to on my own." she said as she stepped forward, her eyes looking deeply into Twilight's own.
"For all the lessons you claim to teach and learn, you've always ignored me. You never even know I existed! Because our parents lied to you, and Shining Armor. They cast me out, because I was unwanted. I was a mistake by them! I was never meant to be born, but here I am! Do you not know how it feels, to know you are born as a mistake by your own parents, then to be treated as if you don't even exist by your own family! Well, now you know!" she said, stomping a hoof in sudden rage, but then seemingly collecting herself. One should likely understand why she had that reaction - because it was true, after all.
"Now it's time for you to learn a lesson of your own. A lesson in family." her eyes would soften slightly, but remaining unwavering as she looked within Twilight's own.