Amrik Vanthampur
From For Companion and Country
Amrik Vanthampur is the middle son of Thalamra Vanthampur. He holds court in the Low Lantern, forging papers to help refugees get into Baldur's Gate but also passing their names to the |Dead Three cultists in the Dungeon of the Dead Three if they're related to Hellriders or members of the Order of the Companion (or are members themselves). In this way, he's the first leg of a three-part triangle that led to several refugee murders.
Amrik has only two bodyguards - a human rogue, and a spined devil. The party has observed him, and pretty well nailed down his role in the refugee murders, but has not confronted him.