Shaitan was about to rule the whole world when he got stopped. He lost his beloved friend Leviathan in death and Gods turned Shaitan into a small, fragile and young girl who isn't able to grow up so he'd never be able to defy Them again. Is Shaitan beaten? No. He just changed his plans: if he can't rule the world by strength, why not by cuteness?

Shaitan is obstinate, determined and reckless. Since he lost his strength, he needed to rely on other things. Now he's kinda curious and develops - even if he'd never admit it - some empathy and wants to help people in bad situations.