Harlequin

Harlequin is a star system with two Class M worlds: Harlequin-3 (also known as Vardaine) and Harlequin-5 (also known as Aloysia). While Vardaine is an Earth colony affiliated with the United Federation of Planets, Aloysia is a non-Federation world heavily influence by the Elasi pirates.

In 2268, the USS Enterprise (NCC-1701) responded to a distress call from the Harlequin system sent out by Harry Mudd. Mudd's salvage activities near Aloysia and the neighboring Elasi-controlled Harrapa system had provoked the Elasi into attacking his Federation-registered vessel.