So this is based off of a YouTube thing that I thought was interesting but it never got finished... so, here you go!

Set like almost 3,000 years before the Equestrian Era.(Except this bc it's the intro plus chapter 1 XD)

I still remember it like it was yesterday, though it was countless moons ago, I was young and foolish, and because of this, I had to watch those I love die around me.

Celestia stares at her sister's bright moon, not yet ready to go to bed, Luna drifts down from her balcony where she had raised the moon, and joins Celestia in looking over the peaks of Canterlot.

"Are you all right, dear sister?" Luna inquires. Celestia turns her head to view her younger sister.

"I... no, I'm not." She admits.

"May I ask what ails you?" Luna tilts her head, starry mane flowing out to the side. Celestia shakes out her coat, rainbow mane fluttering ever so slightly.

"Yes, you may." Celestia pauses, then continues. "I'm just... thinking about past mistakes."

"I'm would've thought that would be me." Luna comments dryly. Celestia rolls her eyes.

"Yes sister, one would think that, but you are not the only one to have messed up, I have made many mistakes, including your banishment." Celestia sighs.

"It was my own fault for letting jealousy consume me sister, you did what you had to, but I sense this is not what is troubling you?" Luna forces her sister to look her in the eye.

"You are right. 'Tis not." Celestia looks down before Luna lifts up her chin once more. "I'm think about... when we were but fillies."

"Ah, I see, and what about that time was troubling?" Luna shakes out her own coat. "Besides our mysterious transformation into the immortal beings we are now?"

"Well you see... it wasn't really a mystery, Luna..." Celestia's eyes fill with guilt and sadness. "There are things I have not told you before."

"Oh?" Luna blinks, frowning in confusion. Celestia sighs.

"I think it's best to start at the beginning..."

Celestia was a young unicorn, born to Morning Star and Dusk Breaker, and she was one of the most promising fillies the civilization of Unicornia had ever seen, today however, she was nervous, why? Because she was about to gain a sibling.

Celestia was pacing outside the nursing cottage, waiting for her mother to come out, her father, Dusk was also pacing quite a lot.

"What is it, is something wrong?" He'd ask every time one of the Unicornian Maidens ran out of the small building to get something, Celestia bit her lower lip, trying to keep herself from asking the same questions herself, and she tried to focus on her Mother and Father's appearance to distract herself.

Her father was a dark blue unicorn with a sky blue tint, he had a black mane and tail with streaks of light blue in it, and a cutiemark of a rising Moon, he was one of the Unicorns who raised the sun and moon each day and night.

Her mother was a white unicorn with a mane and tail like the setting sun, tipped off with the light pink of young Celestia's mane. She bore a cutiemark of a bright yellow star with a Morningflower around it, her talent was herbs.

Dusk kept trotting closer to the cottage, trying to peek inside, before getting shooed away by a Maiden.

Is this how he was with my birth? Celestia wonders.

Suddenly a sky blue Maiden trots out and looks at Dusk and Celestia.

"Congratulations, it's a girl." She smiles and moves aside as Dusk rushes past her, while Celestia quickly trots inside, Morning Star is lying on a white blanket, with a small blue filly in her hooves, Celestia canters up to her mother, looking at her sister in awe.

Her sister is a navy blue, with a sky blue mane, and her little horn is so cute! In Celestia's opinion anyway.

"What's her name?" Dusk asks, as it is tradition for the mother to pick out names, unless you have twins, then each parent may name one.

"Her name..." Star pauses. "Is Luna."

"Luna..." Celestia breathes, Dusk looks at his family.

"It's perfect." He smiles softly, as Star smiles back.

Celestia, meanwhile, is focused on her small sister, looking so innocent in her mother's hooves.

I promise I will protect you. Celestia vows. No matter what.

Well, here's the first part.

Questions:

What do you think Celestia was talking about?

What secrets do you think she has kept from Luna?