Another common theme of the series is the lack of black and white morality. Although Allen initially starts as a hero in the Black Order, their group are revealed to have created actions that might question the readers' thoughts in regards to whether or not the Order is good. Additionally, the Noah clan starts showing hidden depths despite their evil nature with the antagonistic Earl showing his care for the Noah Nea D. Campbell while Tyki Mikk questions Allen about whether or not the Exorcist should return to his "home" due to the way he has been treated as a result of being the Nea's vessel.