Good
ringleader - Someone who is the main influence or motivator behind a particular action or event, especially a disruptive or controversial one.
The police managed to arrest the ringleader of the gang, who had coordinated the series of robberies across the city.
bootcamp - A type of physical training that consists of many different types of exercise; or a short course of intensive study designed to provide someone with new skills
Alice signed up for the 3 month computer bootcamp, that promised her a great job after she graduated.