Another moment from the anthro Sword and Sorcerer MLP dream I had a month or so ago.
Warrior Maiden by Baron-Engel

Traveler from a distant land by Baron-Engel

Winona Rider by Baron-Engel

Dragon Rider Rarity by Baron-Engel
It's also a patron reward for :iconoctifan:. In the dream Octavia had been young musician who was captured by slavers and made the personal property of the slave trader Bloody Hoof. Instead of selling the earth pony the slave trader made Octavia part of her personal entourage.

For several years Octavia served Bloody Hoof, but always she looked for a means to free herself from her plight. Finally fate smiled on the young mare and she was rescued when Bloody Hoof's caravan strayed to close to Equestria borders and Royal Sisters decided to conduct a raid across their borders in the hope of capturing the slaver. They raid didn't succeed in its primary mission, but it did result in the rescue and release of many, but not all, of slaves in the caravan. Octavia was amongst the lucky ones.

Almost all of the slaves had been former subjects of Equestria, and the Royal Sisters worked to help them regain their former lives. However the fire in Octavia eyes caught the attention of Celestia, and alicorn took the earth pony under her wing. Under her tutelage the musician found she was actually not just great musician but also an excellent Battle Bard.

Now trained, Octavia operates as an independent agent of the Crown seeking to bring Bloody Hoof and her kind to justice. The mare still wears her slave collar. She does it to remind her of all those ponies still enslaved, and of the one pony who claimed her as her own. Octavia will remove it when Bloody Hoof pays for what she's done.