Cosgo

Cosgo is the Satrap of Jamaillia. He was a very bright and inquisitive youth that was never told he could fail. He was encouraged as a prodigy in things he was good at and at 11 was given fine wines, drugs, and skilled women. He eventually gave in to vices and his education and emotional development stagnated. He parties often as Satrap and particularly enjoys using Smoke.

In Jamaillia

He had unlawfully granted land in Bingtown to the New Traders, breaking the Bingtown Charter and angering the Old Traders. He has allied himself closely with Chalced, who supply his drugs and Jamaillia's slaves. He journeyed to Bingtown with two of his Heart Companions, Kekki and Serilla, and Chalced warships as guards to reestablish his supremacy and leadership.

In Bingtown

Satrap Cosgo stays at Davad Restart's estate, hosting the various Old Traders and New Traders who come calling. Eventually, the Summer Ball happens and Cosgo meets Malta Vestrit. Serilla, with help from Reyn Khuprus, takes that opportunity to organize a kidnapping of Cosgo to prevent a hostile takeover of Bingtown by the Chalcedeans.

Cosgo and Kekki are held in comfort in Trehaug, but kept isolated for his safety until the buried Elderling city where they are kept, Frengong, collapses in a quake. Malta was in the city at the time of the collapse, freeing Tintaglia the dragon, so she is able to lead the two Jamaillians outside. However, they are lost and need to make it back to the safety of the shore. They end up drifting past the city with no one hearing their shouts and are swept downriver.

After Trehaug

After he was stolen by the pirate ship Motley of captain Red together with Malta Vestrit from the Chalcedeans, they could escape in a Chalcedean vessel. When floating in their vessel, they were picked up by the boat of captain Deiari.