✨ Elriel Universe ✨

1.

Chapter 52 Acosf

A bell rang seven times somewhere nearby, echoing through the stones, through Nesta’s feet. Each peal was a summons, a call to focus. Everyone rose at the seventh peal. Nesta gazed at the sea of pale robes and blue stones as the entire room seemed to suck in a breath.

Azriel's Bonus Chapter

Instead, he found himself at the library beneath the House of Wind, standing before Clotho as the clock chimed seven in the evening.

In Acosf chapter 52 there is a bell that rings seven times and from Gwyn we know that they hold services at dawn and dusk.

Gwyn huffed a soft laugh. “In part. We honor the Mother, and the Cauldron, and the Forces That Be. We have a service at dawn and at dusk, and on every holy day.”

so it is interesting that when they held the service Nesta heard a bell ring seven times and Azriel arrived at the library when clocked chimed seven in the evening.

2.

Chapter 52 Acosf

Not from any instruments, but from all around. As if they were one voice, the priestesses began to sing, a wave of sparkling sound. Nesta could only gape at the lovely melody, the voices from the front of the cavern leading it, lifting higher than the others. Gwyn sang, chin high, a faint glow seeming to radiate from her.

Azriel's Bonus Chapter

Something sparked in Azriel's chest, but he only nodded his thanks and left. He could picture it, though, as he ascended the stairs back to  the House proper. How Gwyn's teal eyes might light upon seeing the necklace. For whatever reason... he could see it.  But Azriel tucked away the thought, consciously erasing the slight smile it brought to his face. Buried the image down deep, where it glowed quietly. A thing of secret, lovely beauty.

In this part what took me back because as you can see...the same words are used? when you look at the context it feels different but when it comes to how the Azriel's bonus chapter was build upon silent music and singing and all...this gave me a pause. I wonder if there is more to it.

3.

Azriel's bonus chapter

He could picture it, though, as he ascended the stairs back to  the House proper. How Gwyn's teal eyes might light upon seeing the necklace. For whatever reason... he could see it.

Chapter 52 acosf

She’d never heard such music. Like a spell, a dream given form. The entire room sang, each voice resonating through the stone

as you can see Nesta says that music is like a "spell, a dream given form" like how Azriel could picture Gwyn's eyes lighting up.

Gwyn’s voice rose again, holding such a high note it was like a ray of pure light, piercing and summoning. Two other voices rolled in to join, pulsing around that repeated high note, the harp still strumming, voices whispering and flowing, lulling Nesta down, down, down into a pure, ancient place where no outside world existed, no time, nothing but the music in her bones, the stones at her feet, her side, overhead. The music took form behind Nesta’s eyes as the priestesses sang lyrics in languages so old, no one voiced them anymore. She saw what the song spoke of: mossy earth and golden sun, clear rivers and the deep shadows of an ancient forest.

Again in here the music "took form behind Nesta's eyes" and she "saw what the song spoke of" like Azriel picturing Gwyn's eyes.

Another thing is that those orange highlighted parts.

Summoning literally means "call an image to mind" as @silverlinedeyes pointed in her lightsinger part one post I'd linked above and it is exactly what Azriel saw in his bonus chapter.

But Azriel tucked away the thought, consciously erasing the slight smile it brought to his face. Buried the image down deep, where it glowed quietly. A thing of secret, lovely beauty.

and I made a post about how glowing "quietly" feels odd and added the link above as well.

Lulling is similar to settle as you can see in the screenshot.

and in Azriel's chapter we literally have that.

Gwyn smiled broadly. "Thank you." Azriel dipped his head in a sketch of a bow, something restless settling in him. Even his shadows had calmed. As if content to lounge on his shoulders and watch. 

I made a post about how this settling could be connected to another "settling" scene with Nesta but it is not in chapter 52 so I'm not including that in this post.

4.

Chapter 52 Acosf

This one was a lilting chant, the words tumbling over each other like water dancing down a mountainside, and Nesta’s foot tapped on the ground in time to the beat. Nesta could have sworn that beneath the hem of Gwyn’s robe, the priestess’s foot was doing the same. The words and the countermelodies danced around and around, until the walls hummed with the music, until the stone seemed to be singing it back.

Azriel's bonus chapter

Azriel entered the warmth of the stairwell, and as he descended, he could have sworn a faint, beautiful singing followed him. Could have sworn his shadows sang in answer.

both scene have gwyn in it...both scene have singing in it...both scene have "could have sworn"...both scene has singing back to it. It is a bit weird?

Now onto the siren connection.

we will go part by part in here as well.

1.

While I was looking up sirens etymology parts stood out to me.

The etymology of the name is contested. Robert S. P. Beekes has suggested a Pre-Greek origin.[4] Others connect the name to σειρά (seirá, "rope, cord") and εἴρω (eírō, "to tie, join, fasten"), resulting in the meaning "binder, entangler",[5][better source needed] i.e. one who binds or entangles through magic song. This could be connected to the famous scene of Odysseus being bound to the mast of his ship, in order to resist their song.

and in Chapter 52 of Acosf we have this

It was like a braid, the song—a plait of seven voices, weaving in and out, individual strands that together formed a pattern. Halfway through it, a drum appeared in the hand of the singer on the far left. A harp began strumming in the hands of one on the far right. A lute sounded from the center. She’d never heard such music. Like a spell, a dream given form. The entire room sang, each voice resonating through the stone.

sirens are described as "binder, entangler" and the music in acosf described as individual strands that together formed a pattern. and sirens bind or entagnle through magic song and Nesta explains the music as "like a spell, dream given form"

2.

Another thing is that Sirens are described as birds.

The sirens of Greek mythology first appeared in Homer's Odyssey, where Homer did not provide any physical descriptions, and their visual appearance was left to the readers' imagination. It was Apollonius of Rhodes in Argonautica (3rd century BC) who described the sirens in writing as part woman and part bird By the 7th century BC, sirens were regularly depicted in art as human-headed birds.

and in Chapter 52 Gwyn's voice is described as a bird.

Gwyn’s voice soared like a bird through the cavern as she started the third song with a solo, and Nesta closed her eyes, leaning into the music, shutting out one sense in order to luxuriate in the sound of her friend. Something beckoned in Gwyn’s song, in a way the others’ hadn’t. Like Gwyn was calling only to her, her voice full of sunshine and joy and unshakable determination. Nesta had never heard a voice like Gwyn’s—by turns trained and wild, as if there was so much sound fighting to break free of Gwyn that she couldn’t quite contain it all. As if the sound needed to be loose in the world.

and the orange part is interesting because Nesta singles out Gwyn's voice from others. As if her singing is different then other. I touched upon this in my Cauldron's song and Gwyn's singing post. In that post Cauldron's luring song parallels to Gwyn's singing as described in that scene.

As you can see Nesta describes Gwyn's beckoning song as "in a way others' hadn't" and "like Gwyn was calling only to her" and with Cauldron's luring it presented itself as Graysen to Elain...beckoned her and told her he'd come for her.

Also beckoning is literally means "lure,charm, entice.."

3.

Lasty we have this about sirens

The early Christian euhemerist interpretation of mythologized human beings received a long-lasting boost from the Etymologiae by Isidore of Seville (c. 560–636): They [the Greeks] imagine that "there were three sirens, part virgins, part birds," with wings and claws. "One of them sang, another played the flute, the third the lyre. They drew sailors, decoyed by song, to shipwreck. According to the truth, however, they were prostitutes who led travelers down to poverty and were said to impose shipwreck on them." They had wings and claws because Love flies and wounds. They are said to have stayed in the waves because a wave created Venus.

one sang...one played the flute...the third the lyre

we are gonna look at the paragraph before the bird connection also I'm adding that paragraph as well.

They finished, and started another song—led into it by a rolling drumbeat, then a single voice. Then the harp joined, a second voice with it. Then the lute, along with a third. The three sang around and into each other, another braid of voices and melodies. They reached the second verse, and the other four joined in, the room with them. Gwyn’s voice soared like a bird through the cavern as she started the third song with a solo, and Nesta closed her eyes, leaning into the music, shutting out one sense in order to luxuriate in the sound of her friend. Something beckoned in Gwyn’s song, in a way the others’ hadn’t. Like Gwyn was calling only to her, her voice full of sunshine and joy and unshakable determination. Nesta had never heard a voice like Gwyn’s—by turns trained and wild, as if there was so much sound fighting to break free of Gwyn that she couldn’t quite contain it all. As if the sound needed to be loose in the world.

a single voice...harp joined...then the lute...

like the three sirens I added above.

one sang...one played the flute...the third the lyre

And again the music is describe as a "braid" like the first point how the sirens were described as ""binder, entangler", and they bind or entangle through magic song. and right after it Gwyn's voice describes as a bird which is what sirens are described as.

so that's about it.