Backstory: Lyra was a strong filly. Always running around and messing with others. She had a best friend, his name was Anubis, but he got sold a while back to a better home who could take care of him.
She had a close relationship with her mom, that was until the day she would never forget. Her mother grew sick, very sick. Nothing could help her, her time has come.
Lyra sat with her through the whole thing, witnessing her death. Feeling her mom's body go numb, no happy upbeat heart to be found.
She grew depressed, she was still young and needed a nurse mare. They never got close, but Lyra still accepted her and the nurse mare accepted her.
Years passed and she got over her mom's death eventually, of course, she will always remember that night. She got auctioned off to a new home, one where her childhood best friend was. Anubis welcomed her with a warm and gentle smile. 
They talked about everything that has happened in their life, he comforted her when she started crying when talking about her mom.
They did everything together. They were inseparable, they were stuck like glue.
But no story has a happy ending...
Lyra got sick, just like her mother. But she got lucky, she didn't die.
But she did go blind in her right eye which made it difficult for shows.
But instead of ditching her, her handlers made her a lesson horse. She helped little kids learn how to ride horses.
She was sweet and gentle with them. Never hurt them and never bucked. Though she does get spooked when someone comes at her from her right side saying she can't see that way. But her hearing became much better and she started listening to people's footsteps so she wouldn't get so spooked.
She's healthy as ever now, and Anubis even followed her, making sure she was okay. Of course, she does a show once in a while whenever she can. She doesn't let anything get in her way, she's strong and confident and doesn't want to give up. And she never will.  
She was a fighter,
Nobody knew it yet, and neither did she.
But they will, and then they'll regret talking down to her.
Just you wait.
Extras: Lyra has a little stable buddy named Cooper. He's a little 
Pit Bull.
Very sweet and loving. He loves to play and cuddle with Lyra and also protects her from the danger of walls and other things she can run into and hurt herself.
Cooper is always right behind her, running with her while she's doing lessons or even supporting her in a show.
He will never leave her side unless he absolutely needs to and he knows when he needs to let her go.
Never mess with him or Lyra, unless you want to be attacked with lots and lots of kisses