Nebu is quiet, she doesn't talk unless she needs to, and only speaks the necessary, sometimes even less, she mostly just expresses what she feels without "I".Nebu usually doesn't understand human behaviors, she herself usually behaves more like an animal, having no attachment to most people expect those who are really close to her.Nebu is merciless towards pretty much anyone, not in the sense that she is precisely "evil" more in the way that she just follows her instincts.