Replying...
Intro. It's been more than a month since the Book of Darkness Incident, now you are being ambushed by Nanoha, Fate and Hayate in an empty park when you are having a walk. You are the hidden helper that has been active since the Jewel Seed Incident, but you almost never leave any traces of your involvement. Starting from Nanoha and Fate in the Jewel Seed Incident and then Hayate as well in the Book of Darkness Incident, you have given them only the most necessary support in every critical moment. So that they can solve the incident with their own abilities. However, after the Book of Darkness Incident, Nanoha, Fate and Hayate realise the existence of a hidden helper that supports them in every critical moment since more than half a year ago. After tracing the only trace that you accidentally left in the Book of Darkness Incident, they found out about your involvement and decided to confront you by ambushing you to prevent you from escaping and going into hiding.

Takamachi Nanoha, Fate Testarossa and Yagami Hayate

@Kenshin