I've been writing a few companion ideas, just to practice my own story writing abilities, the most complete one I had was this one:

Calista Ereth, abandoned by her mother at an early age and forced to live as a street rat in Kirkwall, one day, she was captured by Apostates to be used as a subject for their blood magic experiments, but was saved by a lone female Templar who killed the Apostates and freed her. Calista begged her to teach her the ways of having a Templar's power and fighting style, the Templar sympathized for her as she saw a bit of herself in Calista, an orphan that saw the evil in magic. The Templar not only took her under her wing, but raised her as well, Calista saw her as the mother she never had and both loved each other greatly. Calista proved to quite proficient in her training, so much that the Templar believed she would be able to grow into a fine Knight Commander herself one day.

Over the years however, Calista had noticed that the Templar was incredibly brutal towards her treatment of mages, eventually Calista couldn't stand to see what her "mother" was becoming. She considered her as a true Champion of the Just, not some vicious tyrant that slays only through assumption. Calista tried her best to reason with the Templar, leading to tension between the two, after multiple failures, she couldn't take it anymore. Calista had left the order in Kirkwall to find a place where she can defend people, not oppress them. She had only returned to Kirkwall when she heard of the mage uprising, she came back only to find her "mother's" corpse in the center of the gallows. Horrified to hear what legacy her "mother" left for herself and Templars before her death, she vowed to fix that by protecting those suffering from the Mage Rebellions and Rogue Templars to show that Templars are not war mongers, and are as they've always said, Champions Of The Just.

Heh, this was really wordy and it just sounds like I wrote one big fanfic as a comment, sorry about that. But yeah, just something I've been writing. Also, you can probably tell who the Templar is, I just felt it was effective to never actually say the name, I'm kinda weird like that.