Karl

Karl raised Klara, from the age of two, after her parents died. He had home schooled his granddaughter himself, and he had also taught a lot of things to Felix, whose parents were too poor to pay for a proper education for their son.

Karl was a quite notorious guide and explorer back in his day. He got his hands on the Chronicles of Alhareziel and trying to read it is implied to have driven him insane and led to him forming the expedition to the Dark Heart, the mysterious core region of the Caligare Forest, in search of the Golden Temple. Karl had convinced the King of Medelan to finance the expedition, and expecting to meet dangerous creatures in the Caligare Forest, the old explorer had only taken veterans. At their departure, the group consisted of 10 casters, about one hundred scouts and soldiers, and 5 aura masters, including Sarah.

The Temple was occupied by a Vex Hive and the expedition was wiped out to the last man.