Garheng appeared to be a little sadistic at first. During a plan to get the tears from the mermaid Syrena for the ritual, he even threatened her to get the tears from her in a harsh manner. When Blackbeard was defeated for good, Garheng later joined Hector Barbossa to be part of his crew, alongside the surviving members of Blackbeard's crew.
On board the Queen Anne's Revenge, Garheng worked with the ship's crewmen working with a shanghaied Jack Sparrow who was dissatisfied with him sailing under Angelica and participated in Jack's mutiny. Jack's crew was victorious against the ambush until Blackbeard approaches the groups to which he hung all of the crewmen, alongside Garheng. Garheng and the rest of the crew later were let down to notice the Cook's punishment.
In a plan to to find a mermaid at Whitecap Bay and obtain her tears for the ritual, the crew manages to capture a surviving mermaid named "Syrena" after surviving a massive battle. Garheng later traveled through the Jungle Pools in finding the Fountain of Youth to which he and the rest of the crew obtain a tear from Syrena for the ritual.
Arriving at the Fountain, Hector Barbossa and his crew approach Garheng and the rest of the crew, followed by a battle occurring at the Fountain between the British soldiers and Blackbeard's crew until the Spaniard arrives to the Destroy the Fountain. After Blackbeard dies, Garheng and the rest of the surviving members of Blackbeard's crew later join Barbossa and had the Revenge set sail for Tortuga.