User blog comment:Sir Squibblequiggly/Owari No Seraph Theory/@comment-25942629-20160408184324

Everyone in this series is hiding something, and I believe Shinoa is as well. She is a key figure in the Catastrophe plot as well. She is privy to quite a lot of things in the past, but she was only seven that year. Guren and Shinya are both close to her in the present, and she knows Guren wanted to take down her family. She could easily know something about Mahiru's motives from back then since Mahiru shared so much with her. She might be aware of things she does not realize are important yet.