The world is defined by want. Heaven and man both want it but neither can have it, for there is not enough.
During the war in heaven Thamiel did not fight beside Lucifer, nor did he fight beside Michael. He sat out the war and used the chaos to visit parts of Yves‘ and Eli’s Cathedrals that had previously been barred to him. Like many angels, Thamiel was interested in God’s Grace – but his passion was its excess and absence.
While the other angels were locked in mortal combat, Thamiel was studying the various sights furthest from god’s sight. As the war in heaven drew to a close, Thamiel bought himself amnesty by presenting his findings to Raphael (who was looking for a place to put the rebels).