troublemaker
Definitions
A person who habitually causes difficulty, distress, or problems for others.
Someone who deliberately stirs up conflict or disrupts the peace.
Examples
The teacher sent the young troublemaker to the principal's office for disrupting the class.
Everyone knew he was a bit of a troublemaker, but his charm made it hard to stay angry at him.
Synonyms
agitator instigator rebel provocateur mischief-maker hell-raiser firebrand
Antonyms
peacemaker mediator conformist pacifier law-abider supporter helper