Frost
It had been 5 years since Frost had found out she was an animus. As Queen Snowfall's heir, it would have been really important for her to know her daughter was an animus. Naturally, Frost had not told her. She did NOT want to be used, witch would most definitely have been what would have happened. Queen Snowfall would have spread the word to every dragon out there, which Frost was sure, would end up with dragons being scared of her, or being brutally assassinated so she didn't hurt anybody with her magic. However, Queen Snowfall was not unintelligent, she just did not really care about her daughter. Frost was the youngest of three, so if she died, there would still be an heir to the throne.
            Frost hated being royal, she was in the third circle sure, so even if she wasn't royal she would still have to be respected even so, she still hated the whole thing anyway. In her opinion your circle didn't matter as long as you were loyal to their queen. It didn't seem fair to her that perfectly loyal dragons had to live in poverty, while dragons in the third circle and since were wealthy and treated with respect. In fact, Frost had had just about enough of the palace. She had no interest whatsoever of being queen, and she did not want to have to kill her mother to get the throne. Frost wanted to use her talents, so she left the palace at night, for the big, wide, world.