Though she acts insane and attacks her visitors without mercy if a baby-doll isn't given to her, Nigredo is assumed to be tender-hearted under normal conditions. However, her compassion is often limited to that of infants. Once they live past the age of two, she becomes mostly indifferent towards their well-being. Despite this, Nigredo does not actively seek harm towards humans unlike most of the denizens of Nazarick, and is a generally compassionate individual.