In the Renown option the DMG tells us that it cannot get lower than zero. I disagree, I think it can reflect an increasing enmity. As I see it, a -5 renown score would lead to a NPC/faction actively trying to hinder the PCs. A +5 renown would be the opposite, helping the PCs as they can.

Here’s how the 7As renown stands after a few dealings & side quest with Port Nyanzaru’s denizens:

Zhanti: +6

• defended the Amnian Fop (+1)
• Pokor asked for support on behalf of the Chultan Diaspora (common goal: +3)
• played an important part in capturing the pirate ship The Stirge along with its captain (main interest: +2)

Ekene-Afa: +2

• have freed a spy working for Captain Soshen that had been held prisonner by the Bridgerunners in Malar’s Throat (took side: +2)

Kwayoté: +1

• exterminated the critters in newly acquired mine (+1)

Jobal: -3

• have freed a spy working for Captain Soshen that had been held prisonner by the Bridgerunners in Malar’s Throat (took side: -2)
• the meddling of Pokor in an arena fight, from his spectator seat, led to a scuffle with a pair of affiliated hooligans (-1)