Gwyn is literally totally insignificant to Elain and Azriel's stories. She didn't even exist for the buildup of their stories. She does. not. matter. for either of their arcs. If she did, we'd have know her in the OG trilogy, and in connection to the characters who's arcs she matters to.
It is just like Nuala and Cerridwen are insignificant to Feyre's arc, or Nesta's arc. They're background characters in Feyre and Nesta's arcs. This is not an insult to Nuala and Cerridwen. But say something totally true and descriptive about Gwyn as a character, and you'll have rabid cult members frothing at the mouth, coming after you.
Gwyn matters for Nesta's story. But she is absolutely insignificant for Elain and Azriel's arcs (and Cassian, Rhys, and Feyre's). To their arcs, she's just a background character. So is Emerie. This should not even be controversial. And it isn't, for any other character except Gwyneth, Saviour of Prythian. Say "Emerie is a side character" and you get crickets, because it is literally not a big deal. It just correctly describes canon. But try to correctly describe Gwyn's limited narrative role and you risk getting doxed and bullied, even though her and Emerie are absolutely comparable in narrative significance.
I do not get this obsession with what is a background character for most of the story, and for nearly all the main character arcs. Gwynriels are a cult. They're absolutely rabid. It is total madness to witness this and to exist in this insane fandom for years. What is wrong with these people? And why do they turn themselves into vile people incapable of critical thinking, over this random side character?? Why can't they just appreciate her for her actual narrative role? Why do they have to turn her into not just one main character, but THE main character? Literally why? I still don't get it. Why not just read the books as they are?
She’s a tertiary character overall and a secondary character for Nesta. That shouldn’t be controversial at all, you’re right.
This is literally just from my observations as being apart of this fandom for so long:
Many people do not like Elain. She’s flawed. Misunderstood. In the background etc. Her character hasn’t been fleshed out to her full potential similarly to Nesta pre-acosf.
Gwyn is y/n. She’s Mary Sue. A cardboard copy of a typical bubbly and optical girl in a girl power group. She is perfect. She isn’t flawed. She isn’t multi-dimensional. You can’t sit there and really pick flaws at Gwynerth, because of this, she is the perfect self-insert. People who self-insert want to be THE main character. They want to be considered important by the other characters and narrative in a para-social way. This is why people latched onto Gwyn the perfect and why they project all these crazy theories onto her. She’ll be Nyx’s favourite aunt. She’ll be a spy with Azriel. She’ll lead the valkryies. She’s starborn. She’ll help Lucien out with Autumn. She’s the IT girl. Because thats what THEY want to be. Aka the main character syndrome which they insert onto Gwyn. Azriel was and still is loved by so many people, they want to be with him. They believe he deserves better then boring Elain so enter Gwyn, whose everything. They hype her character up in their heads .
So when you remind these people that hang on…Gwyn isn’t that important, she was created FOR Nesta. She isn’t connected to Azriel or any other character. She isn’t connected to the plotpoints. She’s a tertiary character/secondary character in acosf…because thse people have placed their identities with Gwyn - her ingrained themselves as her in their minds - they immediately become confrontational, offended and insulted. By reminding them of canon and reality, you’re popping the delusional bubble they’re living in.
Gwyn is not important to the story overall aside from the valkryie subplot.
People forget the point of these spinoffs and its to tel/wrap up the stories of these characters FROM THE OG SERIES. Sjm has PLANNED these books from acowar, if Gwyn was ever meant to play such a vital role- the cold hard truth is that she would have been there in the main series. She wasn’t. Gwyn was created for acosf, a standalone. Even Emerie was introduced before hand in acofas…yet no Gwyn but apparently she will be the next great fmc? It doesn’t make sense.
I understand liking a character, hell, I’ve entered this shipwar for Elain but I will nevr understand the Gwyn obsession. Actually, scratch that, they’re obsessed with her because they connect her to Azriel. Take that connection away, she would be another side character.