Her real sword.
Her family's blade.
It was sword that she received as gift when she entered the academy and hasn't it used it till now.
It's seems that it's time to use it.
It was a famous sword. Not a treasured heirloom of her family or anything symbolic—but still well-known enough that most would recognize it. It wasn't her first choice for casual use, but it was the most practical one for her current situation.
Originally, she had planned to keep it tucked away until after the first semester—until she had a better grasp on her capabilities and environment. But the more she thought about it, the more sense it made to bring it out now.
After all, no matter how excellent a sword was, it needed time to get used to. A bond had to be formed between the weapon and its wielder, through sweat and repetition.