Shalnark Ryuseih is a member of the Phantom Troupe, a notorious group of thieves in the Hunter x Hunter anime and manga series. Known for his intelligence and analytical skills, Shalnark acts as the Troupe's information specialist and is adept at using technology and strategy. He is a Manipulator-type Nen user, able to control others with his antenna. Despite his friendly demeanor, Shalnark is ruthless and loyal to the Troupe, playing a crucial role in their operations.