mischievousness

Capacity to do injury; hurtfulness; noxiousness; disposition to vex, annoy, or tease; roguishness: as, the mischievousness of youth.

The characteristic of being mischievous; the tendency to make mischief.

the trait of behaving like an imp

reckless or malicious behavior that causes discomfort or annoyance in others

an attribute of mischievous children