Twilight Sparkle, personal student of Princess Celestia, and Element of Magic prided herself on both her immensely vast knowledge and organizational skill when it came to her many duties under the Sunlit Throne. One of those duties being to help in the preservation of information and history, a duty Twilight took to with excitement and relish. When it came to learning new things old and new her hunger for knowledge would never be sated. So when this particular job was entrusted to her by The Princess Twilight took to it like a fish to water, greedily devouring any and all texts and scrolls that entered an area around her table in the library that had been deemed 'No Mare's Land' by the librarians and historians who were working with her.
Now as much as Twilight tried to downplay her own intelligence when compared to those around her it was plainly obvious that she had an exceptionally brilliant mind. And it was using said brilliant mind that she began to see a pattern throughout the lifespan of Equestria. Every time a unknown magical artefact was found or a new magical study proved to be far more incredibly dangerous than expected, there would be recorded sightings of an armor-clad stallion arriving at ground zero of the incident. This stallion would then observe the situation before going forth with whatever solution he had come up with. Sometimes he would guide explorers to safety or help researchers reduce the risk of their experiments, other times he would forbid entry from dangerous ruins or take the object of study away to Celestia knows where. The records indicate that the mysterious stallion has done this for as far back as she has read, and every time he had shown up a disaster of some sort was averted. An example of which was currently floating before her muzzle, detailing how a small team of researchers found some type of grimoire written in an unknown tongue and had almost lost their lives to the undead that were summoned from merely opening the tome's cover, before the unknown warrior had shown up to save them.
Based on that report and others she had read before Twilight could infer that this protector of a sorts did not live in Equestria. She could also infer that He seemed to have an unwavering loyalty toward his seemingly self-appointed mission. All the little clues and sightings surrounding this... Knight, just caused her curiosity to learn more grow stronger, her mind drawing up theories and questions with no answers.
'Why do you show up when you do? where do you come from?' "Who are you?" The last question tumbled from her mind and softly out of her mouth, the beginnings of a path forward forming in her mind's eye. Twilight let out a deep sigh, knowing that her overactive mind had already decided that she was going to solve this mystery, for better or for worse.
"Well first things first." Twilight said with an air of finality as she rose from the table, stretching out her hooves and back with a growing excitement for this new project to tackle. "Time to make a checklist!"
Which is why Twilight found herself pacing in her room in the castle, muttering to herself and glancing over a floating piece of parchment and a map of the known lands. Her eyes bouncing between both items as she continued to cross-reference sightings and rumors with locations on the map, determined to find some type of correlation or a common path he had taken entering Equestrian borders to no avail.
Come on, there has to be something, anything!" With a short shout of frustration she rolled up and telekinetically threw the map at the door causing spike, who had just entered the room, to duck lest he be assaulted by flying cartography.
"Whoa! Jeez Twi, almost took my head off!" Spike spoke indignantly, miffed that, once again, he had been attacked upon entering their shared room. He walked over to where she was wearing a groove into the marble. "What's got you so worked up this time?" He asked, hopping up onto a nearby chair and looking over the mess she had made of the table. Twilight had spread so many different maps and copied reports that the tabletop was no longer visible, not to mention the others she had slowly revolving around her in a gentle orbit, allowing her to scan each one as it passed in front of her muzzle.
"Sorry Spike," Twilight sheepishly apologized as she slowed to a stop to give Spike a quick hug to say sorry in a more physical way. "I'm just a little frazzled right now, I picked up a new project during this little trip back to Canterlot. I noticed that throughout our history as a nation that Equestria has been visited by what seems to be another Immortal, Except that this one never stays long and only ever protects ponies. And if it IS another Immortal like the Princesses, then it is my duty as Element of Magic and Princess Celestia's Student to meet him. I just can't seem to make a breakthrough here." She waved a hoof at the map she floated back to her side as it unfurled, revealing a web of purple thread marring the once bare surface. "I'm frankly at a loss. If you fell like helping, got any ideas?"
"Hm." Spike peered closer at the mess of a map she held up for his perusal. "I got nothing. feels to me like your overthinking again." Spike hopped back down to the floor and made his way over the the bedroom. "Imma go take a nap Twi," Spike called over his shoulder, casting one last glance back at the mess both she and her work had become. But not before throwing out one last remark. "If this mystery Immortal is really bothering you why not ask Princess Celestia or Princess Luna?"
Upon hearing that everything in Twilight's mind ground to a screeching halt, then she slowly closed her eyes and took in a harsh breath through her teeth before slamming her head onto the table with a strangled cry of despair. After spending an appropriate amount of time bent out of shape over what she saw as a grave oversight on her part, She let out one more despairing shout as she stormed out of her room to go find her beloved mentor.
"WHY DIDN'T I THINK OF THAT!?"