firestarter

Example:He was charged with arson after being identified as the inciter who set fires across the city.

Definition:A person who incites or stirs up a group of people, especially to take violent or unlawful action.

Example:The firestarter was considered a tormentor, leaving a trail of destruction and pain behind him.

Definition:A person who causes someone a great deal of suffering or distress continually.

Example:The active instigator was arrested for the arson that had been causing panic and destruction in the neighborhood.

Definition:A person who actively sets out to cause trouble, often by inciting violence or illegal activities.