Dragon

It wasn't long after Twilight left that Spike began to ready himself in order to escort his friend and mother figure from the library to the train station, where he will not only see her of but also await the arrival of the pony Twilight asked to watch over Spike's greed: Sweetie belle, needless to say Spike wasn't expecting it.

"Sweetie belle!?" Spike shockingly commented. Out of all the ponies Twilight could have gotten, why Sweetie belle ? Spike thought, he assumed Twilight would have called her other friend Moon dancer, who could have really enjoyed the time at the library since both Moon dancer and Twilight are book-lovers, but instead it had to be Sweetie belle, the younger sister of Spike's former love interest: Rarity.

Twilight sensed the distress in the dragon's tone, it shouldn't surprise her as Sweetie belle and Spike have grown closer over the years though they are still friends, it didn't stop anypony from giving them strange looks. But Sweetie belle has become a celebrity, being a well-known singer all across Equestria, perhaps that is what Spike is worried about? The gaining of extra attention? Or could it be something else? she decided to shrug it off and reassure her drake that everything will be alright.

"Spike, Spike, Spike" Twilight said "Sweetie belle is on vacation after her Crusader tour all around Equestria, she could use this time to catch with her other friends Scootaloo and Applebloom, not to mention her sister" she tried to explain to the dragon who appears to be unsettled at the thought "Besides..." she added "she is looking forward to seeing Equestria's beloved dragon again" she joked.

"I'm the only dragon Equestria cares about, Twi" Spike said arms crossed, unconvinced by the words of his alicorn friend.

Indeed Spike and Sweetie belle along with the Apple family's Applebloom, and now stunt-mare Scootaloo have grown closer as friends, it a was a pleasure to see Spike get along with ponies closer to his age Twilight thought; of course it is possible that Spike is older according to dragon standards which gives his interaction with older ponies seem plausible but to see a young dragon interact with young ponies was a joyful celebration for the alicorn. Being the number assistant to the princess of friendship and being the one responsible for saving the Crystal Empire all those years back really did leave the drake of any real friends as most of them only desired attention, and now thanks to Sweetie belle, Spike may finally have somepony to relate to Twilight pondered.

"Okay, if it makes you feel better Sweetie has a surprise for you" Twilight said, "I think you'll like it" Spike raise an eye in suspicion.

"What would that be?" he asked.

"You'll have to ask her about it" Twilight smiled, finally arriving at the train station on schedule, she turned to her dragon and gave out a few last words before saying farewell "Take care Spike, and be good"

"Alright Twi, you to" Spike responded, thinking about the surprise Sweetie belle supposedly has for him.

A few hours have passed and Sweetie belle has finally arrived to Ponyville, she thought that she would receive a warm welcome from her old companions but instead was greeted by a sleeping dragon. She wasn't disappointed from the lack of a welcome home from her friends being busy with their lives henceforth she wasn't exactly keeping her hopes up, but was glad enough that the dragon Twilight asked her to take care of is there waiting for her.

"Spike" she whispered as she poked the sleeping dragon, trying her best not to wake him so suddenly... or get herself drenched by the waterfall of drool forming at his mouth. Gladly enough Spike woke up without that much of a jump. She sighed in relief.