Twilight was confused.
"A boy, Dash? I don't think I understand. You're a girl, Rainbow."
"No I'm not!" Dash exclaimed, standing back up with her chest puffed out.
She could feel her tears welling back up.
"Sure, I'm a girl on the outside, but haven't you ever noticed how different I am from the rest of you? I am not a girl, and I can't stand being treated like one!"
Twilight took a step back. "Rainbow… I'm sorry. I didn't mean to offend you."
Rainbow Dash's face had once again become drenched, tears dripping off her chin as she screamed.
"You're sorry? Everypony treats me like a girl, and the first pony I tell different doesn't even understand!"
Dash lowered her head in disappointment. "Just… forget I said anything. I'm out of here."
And with that, Rainbow blasted through Twilight's, thankfully open, window.
She didn't know what to do. How could Dash not feel "right" as a girl? She was a girl, wasn't she?
"This is so confusing!"
Twilight Sparkle continued to rummage through the growing pile of books in front of her.
"There isn't anything about what Rainbow Dash described in any of these books!"
Her frustration continued to mount.
Spike was standing just a few feet away from Twilight, picking up the mess she had been making.
"Yes?" He murmured, obviously annoyed.
"Spike, do you know anything about what Rainbow Dash described earlier?"
He sat down where he was standing, allowing himself to get lost in his own thoughts.
"Well, you told me she felt like she was a boy, right? I've never heard of something like that before. Sounds to me like she's been doing too many aerial spins if you know what I'm sayin'."
He let out a short laugh.
"Spike, this is serious. Dash was really upset. I've never seen her cry like that before."
Spike went from joking to concerned, retracting his previous statement. He looked down at his toes.
"I don't know Twilight. I mean, shouldn't ponies know whether they're a boy or girl?"
"Of course, Spike. I mean, it should be so obvious, but with Rainbow Dash…. well… there really is something wrong with her."
A light went off in Spike's head. "You think we should write Princess Celestia about this?"
Twilight smiled. "Great idea, Spike! She'll know how to help for sure! Take this down, please."
She began dictating while Spike captured her every word with his quill.
Dear Princess Celestia,
I regret to inform you this is not my next report on the magic of friendship. That report will be sent in good time as scheduled.
This letter is to inform you of an apparent emergency regarding one of my closest friends, Rainbow Dash.
It seems as though Rainbow thinks she is a boy pony, while she is clearly a girl. I've went through the entire library here in Ponyville, unable to find any information pertaining to the illness she has described. I am concerned that perhaps she has been cursed, or struck with a mind-altering illness, but without the proper medical or psychological knowledge, it is impossible for me to tell what exactly is wrong with her.
I've never heard of anything like this before. I assume it is a very rare thing to come across.
I request your speedy reply, divulging any information you can provide that will prove beneficial to my friend, Rainbow Dash.
Your faithful student,
Spike rolled up the scroll, and with a powerful, yet elegant blast of his fire breath, sent the letter to The Princess.
He looked over to Twilight. "Do you think Princess Celestia will be able to help Rainbow Dash?"
Twilight walked over to the window, gazing up at the cloudy sky. "I hope so, Spike."
"… I hope so."