Sandro the Mouth is a resident of Port Justinian, and a conman [1].
In 1270, Sandro encountered a traveller/group of travellers who'd arrived at the port. He was suspicious, given that no ship had docked in the port. Yet they didn't look like mere rabble, or even pirates. He led them to see Talva Silvertongue. Upon arrival at his hut, he asked them to tell Talva that he sent them. He could use the coin.[2]
Later, he convinced a trader to allow him act as his tour guide (for a fee, of course). The trader was in truth another conman. He planned to arrange for an accident for Sandro, then make off with Sandro's ill-gotten wealth. That plan was foiled by a Plague Nest, who killed the "trader". Sandro's life was saved by the shard-seeker.[1]
In-game[]
Sandro appears as an NPC in Diablo Immortal in Port Justinian. He features during the "Welcome to the Jungle" quest.