Based on Sailor Moon Crystal.

The betrayal had hit everyone hard. Queen Serenity who had hoped for a peaceful future between Earth and the Moon and happiness for her daughter and court. Princess Serenity who had a friendship with them. Endymion who had held a brothership with his men since birth. Makoto who had always loved too easily and had her heart broken one too many times, and this time by the love of her life Nephrite. Rei who had held firm with her distrust and dislike of men until Jadetide blew her barriers apart. Minako who was the Senshi of Love and had her truest love thrown back in her face by Kunzite.

But when the news was broken to Ami, her face never changed. It remained a blank mask as she calmly got up from her seat and walked to her room locking her door behind her quietly. While the other girls could been seen and heard crying from around the castle, not even a whisper came from the room of Mercury's senshi, and all assumed she was drowning in her books.

When Queen Serenity called a senshi meeting three days later, jaws hung when Sailor Mercury emerged. Her uniform was ripped at the sleeves making it look like a muscle shirt, she had cut her hair short unlike any of the other senshi, except Uranus, and she had triple piercings in her ears. The most drastic of changes though included the chill that followed her everywhere, the look of ice constantly etched on her face, and the empty bookshelves and roaring fireplace the maid found when she went into the room.

She had thought that Zoicite was her equal. Intelligent. Thoughtful. And maybe a little shy too. She knew now how wrong she was. He was far cleverer than her. And manipulative. And awful. But she had learned. She was the senshi of Wisdom after all. She would never been seen as weak, or meek, or shy again. She would never BE weak again. She would not live in a world of paper and refuse to see what was in front of her. She had to be smart. To be smart she had to be cold and calculating. Any amount of warmth would melt the ice. She needed the ice. It was sharp and beautiful and perfect.

Mercury was ice. She felt nothing. She was lethal.