I like your character but there are a couple of small things that bug me.
1) She's an Orlesian an elf and a mage, a combination that would cause her to be treated like filth, specially in Denerim.
A) Scullery maid is the lowest of the low. The chantry accepts almost anyone as a Lay Sister. My original intention was for her to serve under an Orlesian Arl, but clearly my character isn't old enough for that. I will change it so that she will be 36 instead of 27
2) Also seems unlikely that she would be able to serve the chantry and marry a templar without someone figuring out she was a mage.
A) Due to the rebellion (which is Ferelden gaining independence lead by King Maric Theiren) diplomatic relations with Ferelden may not have allowed armed Templars to enter Ferelden (even at the Chantry's behest). The reason nobody found out my character was a Mage was because she herself had no idea. It took a demon for her to remember. However once the Rebellion had been won the Templars came and attacked her. As for when she beat them they didn't attack her again, I'm uncertain. She could be protected in the Alienage by the other elves but there is some time before that where she was vulnerable.