Hojo Soun plan was simple, take over the world.  But the rate of which information travels in the modern world is too fast.  At the urging of her host mother, Hojo attends the local school in which she realizes that to take over, you have to start small.
I held back, so he won't die.
De todos modos, me contuve 
a tal grado para no matarlo.
De todos modos, me tuve 
a que contener mucho para no matarlo.
Eu me segurei para não matá-lo.