Sabian

 is a former crewmate of Fjord.

Background
Sabien was the one responsible for sabotaging ship Fjord worked on. Fjord walked in on Sabien lighting a fuse, but before he could react Sabien wounded him with throwing daggers, ran to the deck of the ship and jumped into the ocean. After surviving the explosion Fjord returned to one of his contacts and learned that Sabien had also survived.

Encroaching Waters
In the Wayfairer's Cove, Captain Adella tells Fjord she heard Sabian was working with a shady merchant named Cadamus Leland.