Portraits revealed through your current reading position.
The divine name Emberus uses for Samantha in the quest demanding her capture.
When Emberus updates the quest Find out who killed my son, he names his target not as Samantha but as "this so-called Psamathe," who claims she was part of his son's death. He wants her captured and delivered so he can handle the interrogation personally, after which he intends to cleanse the world in fire to remove the stink of the murderer's presence.
The name marks the difference between the crawlers' hovering, sardonic companion and the demigod daughter of a god — the thing Carl is now commanded, as a martyr, to fly out and bring to her father.
Emberus's name for the demigod he demands be brought before him.
Also appears in books you've already read — spoiler-safe to their endings: