Although I haven't read EF yet, people have been telling me some stuff on her character, both here and on reddit, and with that and what I've seen of the series so far, and the info we have in general, I think I can see a way of how Freya can decide to become Syr.

From what I got, Freya is her selfish self and Syr is her kind self. Warn me if you think I'm off here. I'll only ponder reading EF after vol 18 is out.

Freya isn't exactly a fan of doing evil stuff, but she does, and from what I saw on the ms so far, she thinks she is always right about what she does. Now, here is the thing: what if she saw something that she did, actually harmed someone else?

With the Fulland tale and everything on vol 17, I think that the spirit's change of mind is gonna be Freya becoming Syr.

Oh, I should have warned in the beginning, this is again, fully based on the idea that Bell's background is gonna be revealed. Sorry about that, but I'm gonna keep this belief till the end.

So, yeah, Freya finds out about Bell and realizes what she took from him. And I know most of you are gonna say: but Bell had a good life with a caring grandfather. He did not suffer any damage. Yeah, and that logic may also be in Freya's mind as well, but there is that undeniable aspect that he did lose a possible home and family, even if that did not actually affect him that much. So, Freya would see that her actions, her selfishness (honestly, even if Hera and Zeus constantly humiliated her, kicking them out when after they had almost succeeded in saving the world and were slaughtered, is a huge dick move. From what I got from some talk on reddit, Ottar thinks the same thing, and maybe even Finn, though now I'm fully talking on reference, so there's a chance I'm wrong on this one as well), actually wounded someone, even if that person doesn't even know that wound is there.

I think this would be a great way to make her change. I picture it as her being stuck between Syr and Freya. Syr wants to apologize to Bell and protect him, Freya wants payback for all the humiliation that Hera and Zeus did to her, and Bell also humiliated her in vol 17 people (though he did not intend to). And, before you say anything on how she let go of her grudge on Astrea Records: clearly not in her right mind and this would be the ultimate humiliation. Pretty sure she never fell in love with a Zeus or Hera child and was rejected.