Zeke is a con artist, who can be found in Carnival. He offers you an overpriced Stone to Flesh Scroll, in order to free the cleric Branwen.

If you buy the scroll from him, use a scroll from his quick slot while charmed, or use an other scroll to unpetrify Branwen, he will leave.

Zeke can also be pick-pocketed by a thief or bard in the party. In
BGEEglow BG: EE (2012)
This icon stands for Baldur's Gate: Enhanced Edition without Siege of Dragonspear installed
you need 50 points in Pick Pocket.