>>719125617
Harlequins are Eldar Gestapo. They're warrior-poet-historians who travel around fighting daemons and delivering cryptic messages, typically to other Eldar, and almost always in the form of dance and stage performances.
Whereas Eldar messages are weird for humans, Harlequin messages are weird for Eldar. Craftworlders are wary of them and Dark Eldar are terrified of the fuckers, because a Troupe showing up is almost always a bad sign that shit is going to hit the fan from left field. Their weapons are esoteric even by Eldar standards and they know the Webway inside and out.
They're also infamous for being the hardest army to properly paint on the tabletop by a country mile.