[Twilight's Perspective]
The visit was unexpected, to say the least. When Twilight was told she had a visitor from the School of Friendship, she'd expected a student or one of her close friends. She was not expecting a grown stallion the color of graphite to walk into her newly rebuilt throne room.
"Knox?" she asked. "What are you doing here? Did something happen at the school?"
She visibly sighed in relief as the stallion said, "No, Princess. Nothing of the sort." However, she was somewhat confused yet again when he added, "I've come before you to discuss a matter of great personal importance."
"What exactly have you come here to ask?"
"I have come here to ask about a statue I came across within your hedge maze. The one with her."
The princess was now thoroughly confused. "Who do you mean?"
"Cozy Glow, that's who. I've come to ask why the statue was made. Why would somepony carve that sculpture, so readily associating a little filly with the likes of those two monsters?"
Twilight didn't understand. Did the stallion that stood before her not know the true nature of the statue he spoke of? Even so, why would this be a personal matter to him?
"Knox," began the princess, "Do you know what that statue actually is?"
Her question seemed to confuse the unicorn, so she continued to speak. If he truly knew nothing of the events that had transpired a few months ago, then she was going to tell him everything.
"Just shy of five months ago," started the princess, "Cozy Glow and Tirek escaped from Tartarus. They teamed up with Chrysalis, the dethroned Changeling queen, and attempted to take over Equestria as an act of revenge. They almost succeeded, but my friends and I were able to defeat them. Princesses Celestia and Luna, along with Discord, used their combined powers to turn the three of them to stone. That statue of Cozy is no statue, Knox. It actually is her."
Knox had long since fallen silent. He was currently sitting on the floor, head hanging down in despair. When he finally raised his head again, Twilight was shocked to see that her old acquaintance now seemed to be overcome with rage.
"How could you?" he practically screamed. "She was just a little filly! A little filly who meant the world to me! A little filly who was my best friend! A little filly..."
He paused a moment, as if pondering whether his next words would be a mistake.
"...who was my family," he concluded.
Twilight was beyond shocked. She had never even thought to consider the notion that Cozy Glow might've had somepony who would miss her after what she'd done. Yet here he was. Was it truly fair to keep this pony from the filly he considers family? It wasn't like she could just release Cozy Glow. The little pegasus could never be trusted. She was too dangerous. Twilight would still be pondering this conundrum many hours after her guards had quickly escorted the enraged unicorn out of the castle.
The concept of turning villains to stone had worked before. It was a stone prison for some tortured soul... Only this particular statue was torturing more than the three villainous souls trapped within it. There was now a fourth tortured soul.