House Medani is a half-elven Dragonmarked house throughout Khorvaire however most of its activity is centered in Breland.
They possess the Mark of Detection.
Many see House Medani as the house who truly violated the edicts of neutrality in the Last War. It’s common knowledge that the half-elves of house Medani use their connections and their dragonmarks to gather intelligence for Breland. The alliance only grew stronger as the war progressed. This relationship moved closer still as Baron Trelih became good friends with King Boranel. This caused a number of problems for House Medani when they were hired by other nations as sentries to guard against Breland attacks.