Plyko is an intergalactic smuggler and technopathic starship pilot related to Vala Mal Doran.
Plyko had worked with Vala in the past,and while residing on the planet Charos he and other smugglers where contacted by Vala to form a team and retrieve valuable data. (SG1: "Vala Mal Doran 1")
Later on, a more aggressive Plyko wielding an Ankh weapon aids SG-1 solve the Strayka problem on Glaudyk. (SG1: "Vala Mal Doran 2")