Kestor was an able merchant in Baldur's Gate, and also a prominent member of the Merchant's League. Kestor owned a merchant fleet that traded spices and silks with many exotic countries, like Halruaa, Balduran, Chult, Dambrath, Nimbral, and the Tashalar. He was one of the few non-Calishite proponents of the idea that the Knights needed to work with the Rundeen. Kestor had a very long history of rivalry with Aldeth Sashenstar and used all of his and the Knights' resources to try to ruin his rival. He invested a great deal of money in the colony of Fort Flame, losing it all when the sahuagin destroyed it in 1369 DR.