During the first encounter with James' team, Menken was in the woods with his sons when they discovered Neku and Snow, who had just been released out of the bridge. Menken and his sons captured the pair and sold them to the performing house as spectacles.
Later, when the Sapaar took over the planet, Menken joined Werner's Union in resisting their rule. He was guarding the door when Werner brought James' team to visit their headquarters. Menken later participated in the assault on the nuclear power plant.
When the Sapaar initiated the destruction of Gaman, Menken followed Werner and escaped the planet on Werner's shuttlecraft. He and Brut manned the explosive release hatch during the space dogfight, and later on the planet Menken survived the Sapaar raid with only a large gash across his back.
Later, Menken proposed the name "Verner" for their new united colony. (Ship of State)
- Card of Ten (first appearance)
- Menken is the only inhabitant of Gaman other than Seska to appear in both parts of Card of Ten. His name is also the first Gamanian name heard.
- Menken's sons are never mentioned in Ship of State. Their fate is unknown.