Given the fierce reputation of tieflings, many visitors to the Tarnished Cup are surprised to find one behind the counter. However, Gavan Sul is the very soul of urbanity, so much so that he comes off as slightly insincere when he flatters customers about how well a particular piece of jewelry or clothing would look on them. That’s because Sul is insincere; he cares only for profit and would sell the eyes of his own mother for enough coin

Sul is a fence for the Iron Rats, a gang that prowls the Warrens. Every so often, a member of the Rats gets the idea to rob the tiefling’s shop, but such thieves are never seen again. Sul is also secretly involved with the Ianto Traders, members of House Ianto who aren’t ready to quit the slave trade just yet. The tiefling sometimes abducts patrons of his shop to supply Ianto’s illicit operation.