Samson
Importance:
Cailynn's oldest friend and constant companion, who can speak plainly only while a berry lasts and has to choose his moments carefully. He knew more about the Wildblood than he had ever said. He explains what a Slayer is - a veilwalker given too much knowledge too quickly - and warns Cailynn that killing such things costs you pieces of yourself. Cailynn has told him that whatever else turns out to be true, she will not turn on him.
Since then
The berries are few, so I will not waste one. Listen carefully: killing them is not free. You pay with what you are.