Isadora Umbren
Importance:
The other half of Via's correspondence, and the one standing nearer the fire. Her father received an envoy out of Soleilae. The Shepherd - the same man who took an interest in Edwinn - appeared to her and threatened her into continuing the ritual. She carries the same draconic pact as Poppy, and it takes some probing before she tells Via any of it: what she knows costs her something to say out loud.
Since then
He did not ask me to finish it. He told me what finishing would cost, then what stopping would cost, and left me to do the arithmetic.