So this book has an underlying meaning, I guess and I thought I'd tell you if you really care enough to read this. You don't need to interpret the story like this, I'm just saying this is how I interpreted it when writing it!

Anti is obviously a demon and has a very violent nature which is understandable since that's his character, right? His past involved a lot of violence as it was something that made him feel powerful. Seán is a manifestation of Anti's conscience. Seán was the one who created Anti's evil side as he was around before Anti became... well... Anti.

The reason I refer to him as Seán rather than Jack (if you have read my other stuff, you'd know I always refer to him as Jack for some reason) is because I see him as someone different to the YouTuber Jacksepticeye. I guess he's basically Jack before he had YouTube and before the egos were created. That's why he's so aware of other people's emotions: he was Anti before Anti existed. He was also a part of the other egos too before they became who they are now. The reason Seán can coexist with the others so well is because they have similar intentions: good. Seán and Anti don't get along because Anti wants to kill whilst Seán doesn't want anyone to get hurt.

Anti grew into his own person(/demon) as Seán created the character and people became more aware of him. So basically, Anti morphed into what he was created to be: utterly evil with a desire to kill.

Seán can still get to him in his dreams as he isn't trying to repress him during those moments. He tries to convince Anti to go back to who he was before he turned to violence and to accept emotion again. This part of him is extremely empathetic (fun fact: Empathy was actually the original name of the story but as I wrote more and more it felt less suiting) and doesn't want to cause people pain. So, he accepts himself as Seán when he becomes human.

When Seán 'dies' in the final chapter, Anti loses his conscience. This allows him to become violent again and helps distract him from his worries and sadness.

So, tldr: Seán is Anti's conscience.

I don't know if that makes sense written down but it makes sense in my head :P

Thank you for reading!

Out of interest, did any of you interpret it this way? Or did you just read it without thinking about underlying meanings?