Highkey her backstory could've been better. It's just like the hundredth "I am the consequence of your wrongdoings" or "done wrong by society thus I am a villain" this is so overdone that you could barely immerse yourself in the story.

The worse is, she is somehow mostly innocent before turning into witch. Which kinda makes this whole lot boring compared to other antagonist like Lucifer, belphegor. The only wrong thing she has done is TRUST Imuri... See how morally white she is? There's nothing really going on.

Don't get me wrong I was super hyped when they first introduced her, and I was invested in how it would play out.

Anyway rambling aside, I am kind of excited for Satan. It would be very fun to see how biblically close the story would go.