Those kids are hated for what they are, abandoned when they are born. They are meant to be a symbol of disfortune so they are usually executed when they are born although some families which haven't the guts to kill a newborn abandon them to their luck...
Some of them get luck enough to survive, well better said someone or something save them.
There is a strange creature, some call it "The Fallen", there are old tales about him identifying him as a symbol of disfortune, destruction and catastrophes.
But that are all old tales, for the moment what this creature is doing is raising those abandoned children, feeding them and taking care of them. In exchange the squarehead are using their magical powers to paint magic protection runes around him (or maybe they are just having fun painting) Anyway these are just words.