Maybe its her hypocrisy then. She comes across as the nicer one of the Guardians of Homaspernia, with politely asking the MC things, seemingly caring for him and pleasing him even as her slave...But then she sends him to do immoral shit with no hesitation, uses him to boost her own ego at all times, gives zero damns about collateral damage when in person, and holds no regard for morality and the people around her, only her desires. She says as much herself: She doesn't care that one demon ordered a couple miners killed, she cares that he insulted her. Yakuu is awful, but is honest and upfront about it. Pykea comes across as gentler, but it's slowly revealed to be a mask she wears because it benefits her.