The only means I have of doing anything to her are the element of surprise, as she currently does not know my intentions, nor what I am capable of, and I am certain that I would not last long in a direct confrontation with her. [Yet.]

My idea is of course to draft a contract, temporarily incapacitate her, and then use my ability to puppeteer her body to force her hand while she cannot fight it.

Itsuki-kun may not desire such control over others, but he has had it before, and would no doubt handle having it again, especially if it were to give him a weapon to use against me, such as a powerful fighter from my own unit.