Vandran

 was a human captain and mentor of Fjord who had some connection to Fjord's patron. As an NPC, he is played by Matthew Mercer.

When Fjord pushed the yellow eyelike orb into his chest, he saw a vision of Vandren standing over a dead body. In the vision, Vandren pushed the same orb into his chest and summoned the falchion associated with Fjord's patron.

When questioned afterwards by the Mighty Nein, Fjord described the vision and mentioned Vandren as his mentor who he had not seen since sabotage sank the ship they were on.