Equestria: 4 days after Luna's Return

In the beautiful land of Equestria, peace is reigning throughout the land. It’s time of celebration due to the return of Princess Luna. Thanks to the Elements of Harmony, the royal sisters are reunited and they couldn’t be happier.
“How are you adjusting to life in Equestria since your return, dear sister?” asked Princess Celestia to her younger sister as they were walking the halls of Canterlot Castle.
“So much had changed since we’ve been gone. It’s almost strange to be in Equestria once again.” Said Princess Luna “Although, it’s a great pleasure to be with you once again, sister” she then nuzzled her big sister.
Princess Celestia smiled and nuzzled back, “It’s great to have you back once more, Luna.” Said Celestia “Now, I require your assistance in something.”
“What is it?” asked Luna, Celestia was always a bit stronger than Luna, so having something that required her as well must be of great importance.
Celestia gave her a gentle smile “I did remember to tell you about my student and her newest assignment, correct?”
“Well, of course! If it wasn’t for Twilight Sparkle and her friends, I wouldn’t be here by your side. I can’t thank them enough for what they’ve done for me. You said you assigned her to learn more lessons about friendship, but what does this have to do with us?” exclaimed Luna.
Celestia smiled, in the few days since Luna's return she had spent hours teaching her little sister the many events that occurred these past thousand years and the changes in society, hearing her speak modern Equestrian brought joy to her heart, more so without the Royal Canterlot voice.
“Well, I know that Twilight has to learn many things about friendship. However, I would like for there to be someone to be able to not only learn along with her, but to teach her and her friends some lessons as well.” said Celestia as she was leading her sister to the Royal Archives.
“SomeONE? Do you not mean somepony, sister?” asked Luna.
Celestia gave Luna a caring smile. “Not exactly. While I was awaiting your return, I stumbled upon an old book written by Starswirl the Bearded. This book talked about his discovery of a new world. This world called ‘Earth’ was said to be inhabited by creatures known as ‘humans’.”
“’Humans’? What do these ‘humans’ look like?” asked Luna, clearly intrigued with this information.
“Instead of telling you, how about you see them for yourself? It seemed that Starswirl had created a spell that would allow us to see into their world and, if one has enough energy, even create a portal from our world to theirs. I have seen these humans and even though some of them are a bit violent, I have seen that most of them have caring hearts. I, with your help Luna, would like to bring one of these humans here to Equestria.” said Celestia as she pulled out a silver coated book, wrinkled with age, yet still perfectly intact.
“But sister, what if this human turns out to be as one of the violent humans you saw?” said Luna, concerned about her sister’s and everypony’s safety.
Celestia turned towards Luna and gently nuzzled her “I have thought this through, Luna. Once I use the viewing spell, I will use a spell I’ve devised to search for a specific human. It will also allow me to view that human’s past to see what kind of person they are.”
Luna looked at Celestia and smiled “Ok, Celly. I trust your judgment, however what do you require of me?”
“I wouldn’t do this without your opinion, Lulu. You are my sister and we rule Equestria together.” said Celestia, using Luna’s childhood nickname.
“Thank you, sister.” said Luna as she hugged her big sister. “Shall we begin?”
“Indeed we shall.” Said Celestia, as she opened the book and searched for the spell. Once she found it, her horn began to glow a bright gold. A magical window appeared before the royal sisters and began to show the human race. Celestia and Luna were surprised with not only the problems humans had, but that they had knowledge of Equestria as well.
“Sister how is it that they know about us and Equestria?” asked Luna, afraid that they know about their kingdom.
Celestia managed to regain her composure “It would seem that they believe us and our kingdom to be an old mare’s tale. This will certainly make their being here interesting.” Celestia began using her spell to search for the perfect human to bring here.
“It has to be someone young enough to believe, yet old enough to be street-smart, pure in both their heart and emotions as well. Innocent, yet flawed.” The spell showed Celestia and Luna many humans of all kinds before stopping on one; it was a young boy of about 17 years of age. He had black hair, brown eyes, about 5’11 in height. He was wearing glasses, a white shirt, and black pants and seemed to be in a school at the time with other humans.
“I think this human will be perfect. What do you think?” asked Celestia.
“He seems nice, but I think we should check his past to see if he has good intentions.” Said Luna.
Celestia rolled her eyes “If you wish, Luna.” The window began to change at started to show the human’s past. They learned basic information, such as his name, his family, and his education. They saw he was a trusting individual, kind, loving, intelligent, and would do anything to help his friends.
Luna smiled “I think he will do just fine.”
“Very well” said Celestia as she cancelled the spell, causing the window and the picture of the human to disappear. She then began to levitate a scroll and quill and began to write
“My dearest student, Twilight Sparkle. I have a special addition to your assignment on learning the magic of friendship. I would like for you, Spike, and your friends to come to Canterlot as soon as you can. Signed, Princess Celestia.”
She sent the letter away towards Ponyville. 'I have a feeling that this human will change Equestria for the better.'
“Come Luna, we must await my student and her friends and then we can bring our guest.” Said Celestia as she walked towards the throne room.
“Coming, sister!” said Luna, now excited on the new arrival coming to Equestria.