Fragile Soul: The Story of Softy Blue

The mourning sun was rising, waking up married couple Starry Night, an indigo unicorn stallion with a lavender mane and tail and a crescent moon and stars for a cutie mark, and Twinkle Wish, a white unicorn mare with a red mane and tail and a purple shooting star cutie mark. Today was a special day for the pair. Not only was it their very first wedding anniversary, but they also had a foal on the way. Little did they know, its birth was closer than they thought.

One hour later, Starry Night was sitting in the waiting room of Canterlot Hospital when he had an unexpected encounter.

“A foal’s birth on your wedding anniversary?”

Starry Night turned his head to see who just spoke to him. When he did, he stood up quickly then bowed and said, “Princess Celestia! What are you doing here?”

“I have something to tell you and your wife about your foal,” said the solar princess, “but it can wait until I can speak with both of you.”
Just then, the door opened, and a nurse poked her head into the waiting room and said, “Starry Night? You may come back now.”
With that, Starry Night, followed by Celestia, followed the nurse to Twinkle Wish’s recovery room. When they arrived, they saw Twinkle Wish holding her newborn foal. “It’s a colt.” Twinkle Wish said softly. The colt had a bright blue coat and a green mane and tail, but he was missing one thing, something he should have since both of his parents are full-blood unicorns, a horn.
“Hey, where’s his horn?” Starry Night asked.
“I don’t know,” Twinkle Wish responded, “I was wondering that myself.”
“I believe I can answer that question.” said Princess Celestia. “It’s the reason I am here.”
“Not to be rude, your highness, but…” Twinkle Wish paused for a few seconds. “...care to explain?”
“Very well.” The princess began her explanation. “I sense that you have just given birth to what is known as a fragile soul, a pony whose life force is as delicate as a feather. It relies on positive emotions overthrowing negative emotions. That is to say, feeling more good than bad. In addition to this burden, his genetics don’t determine the type of pony he is. That is random, and it looks like he was selected to an earth pony.”
Twinkle Wish looked at her newborn foal once more then smiled softly and said, “Well, in that case, I think his should be Softy Blue.”
“I agree,” Starry Night responded.