This yandere Clara while in her evil cycle is really not all that surprising to me. Clara is usually a rather "passive" demon and while she follows her desires and wants, she still thinks of other before herself. This yandere version is of course her being true to her desires as well as her fear that her closest friends that she loves a lot will leave her.
We all know that neither Iruma or Azz will leave her even after they graduate as the three have become a very inseparable group, but I get her harboring that fear deep down, especially with how she had been treated by others before she had met Iruma and Azz.
We all know that neither Iruma or Azz will leave her even after they graduate as the three have become a very inseparable group, but I get her harboring that fear deep down, especially with how she had been treated by others before she had met Iruma and Azz.