Wermyn held the position of plant operations manager and was responsible for the operational status of the Maw Installation; he was an Aquellan. Displaying the customary green-purple tattoos seen on all Aquellan males, he possessed only one hand.
In 11 ABY, during the Battle of the Maw, Wermyn intentionally damaged the Installation's power-generating systems. However, after being apprehended by General Wedge Antilles and Page's Commandos, he proposed to fix the destruction he had caused.