I don't own Thor or the Avengers.
Growing up in the palace is something hard to imagine. My mother, Ingrid, had been friends with Frigga since their childhood years, and once my mother had me, my parents, my sister Sif, and I moved into the palace. Frigga had two sons, Thor and Loki, and I quickly became friends with both of them. While Thor was loud and boisterous, Loki was quiet, subdued, and calculating. My love for battle connected me and my sister to Thor, while my unique magical abilities and quiet tendencies helped me identify with Loki.
Though Loki was far more skilled in the mystical arts than I, we trained, researched, and practiced our magic together. I knew Loki was far more powerful than he would ever let on to anyone other than me, but fear of the unknown was what kept his enemies on edge. I could see the future through my dreams which always helped Asgard in battle. We quickly learned that besides my premonitions, I wasn't good for much more than defensive spells. I was one of the most qualified archers in the kingdom, but luckily where my arrows failed, my magic could compensate.
Thor was determined to better my skill with a blade reasoning that if I could take on hundreds of soldiers with a bow and arrow than I should be able to hold my own with a sword. At first Sif was responsible for my training until Thor discovered that my sister and I were accomplishing a lot that had nothing to do with sword fighting and took over. I remember the day when I was deemed worthy enough to receive my own battle sword. Gleaming metal with a gold hilt that was decorated with Tanzanite gemstones. I could sense the magic that the blade had been blessed with and new immediately that Loki had set up wards of protection on my blade.
A pattern was established very quickly that left me exhausted at the end of each day. In the mornings I was to arise and meet Thor at the training field after breakfast each morning. After sword practice, I was free to spend time practicing my archery and offer help to the training archers. Following lunch everyday I would meet Loki in his private library. Each day we would talk about our mornings and practice our basic skills. Sometimes we would wander the palace playing harmless pranks on the Lords and Ladies of the court. Some days we would research a new aspect of magic we hadn't understood before and begin our attempts at mastering it, or in my case helping Loki master it. After supper was the time when I joined Sif and the Warriors Three in battle training. With scenarios that were setup differently each day, we were able to strengthen our weakest areas to become stronger warriors to protect Asgard.
So this continued on for hundreds of years. Everyday the same routine until one night when I saw the future. I knew from the moment I woke up I knew that everything was going to change, and for the first time in five hundred years, I didn't meet Thor on the training field.