Another Sister

Angel was in the throne room, telling Luna and Celestia the story. "and then all I saw was darkness. I thought I died. But I realized I was encased in stone. I could see everything, everypony. I wasn't too sure if anypony  noticed me, but I doubted it. I watched  time passed by, watching Canterlot grow. I watched Discord's return, the chaos wreaking havoc everywhere. One day, I saw a bright light, passed out for a moment, and then ended up in Manehattan, and somehow I had a hat on my head. I kept  it there because it covered my horn. Then I came here." Angel finished her story. "I am going to send a letter to Twilight, informing her about your arrival." Celestia said. "Thou has training to get to." Luna added.

An hour later, Twilight and her friends arrived. "We heard about ya special guest, princess. We got the Elements of Harmony ready ta stop 'em!" Applejack said. "Ooh yay! We get to use the magic necklace thingies!" Pinkie said. "Get them ready, girls!" Twilight said, putting  her crown on her head. "No, please don't hurt me!!!" Angel screamed. "Twilight, no! Thou special guest is a princess! Do not harm thou!" Luna yelled. "Luna is right, Twilight. Our guest is not one you need to hurt." Celestia added. "Her name is Angel, and she has  much to tell you." Twilight took off her friends' necklaces. "We're sorry Princess, we truly are. Forgive us?" Applejack asked, bowing to Celestia, Luna, and Angel. "No need to say sorry. You have already been forgiven, haven't you?" Celestia said, looking at Angel. "Yes, you have been forgiven. Now please teach me, if that is possible." Angel replied. "Yay! What do we teach you about? Cupcakes? Frosting? Mmmmmmm frosting, creamy frosting." Pinkie said, starting to drool. "We'll teach you everything we know!" Rainbow Dash said. "I'll teach you how to fly! I'm the best flyer in Equestria!" She said. "Rarity and I can teach you magic, Fluttershy can teach you about animals, and Applejack and Pinkie Pie can teach you about cooking!" Twilight exclaimed. "Ooh! I get to work with my cousin Applesauce--I mean Applejack!" Pinkie said.

After hours of training, Angel was ready. Ready to be seen in front of the ponies. The next morning, as Celestia rose the sun, Angel flew up into the air. She flew over the ponies, her pink mane flowing  in the wind. The ponies smiled when they saw her. When she lands back on the balcony, she saw a flash of light. Celestia smiled. Angel turned around. "My cutie mark!" She said. Her cutie mark was a peace sign  yellow on one side  and blue on the other. "My special talent is making peace! After all these  years I must have forgotten!" Angel exclaimed. Angel looked up at Celestia. "Do I get to stay her  forever, or do I have to rule someplace in Equestria? I want to stay here with you and Luna." Angel said. "You certainly can stay here. But you'll have to travel around Equestria, spreading  your peace. Is that okay?" Celestia asked.

"Yeah, that's perfectly fine with me."