Anemo, a version of Rex Crozzo also known as Cerberus, is a young man with eyes that looked like two expertly carved diamonds. His dark hair danced with the wind as he floated in place in his domain, a place that he had managed to build by himself, hiring numerous archon versions of himself to live and maintain the place. The archon hall, the name of the palace he had built with only an entity called 'Rex Crozzo,' can enter. 

"Gnoses, powerful artifacts from the world of Teyvat, are what essentially bestows a being the title of an Archon," Anemo whispered as he gazed at the glowing queen chess piece in his hand. "The Gnoses are the embodiments of the Heavenly Principles' control over Teyvat and of the "laws."

Little is known about the full abilities of the Gnoses. So far, they are said to resonate with Celestia directly and grant their respective Archons the "divine ability" to defend their nation.  Nahida's understanding of the Gnoses was limited to knowing that they could be used to summon a mass of elemental power at their owner's disposal. 

The Gnoses, while powerful, are not required to manipulate an element by itself. After all, Geo, now known as Cerberus, had given his Gnosis up for a foolish wish. Despite this, he has retained his abilities to use and harness the power of Geo, despite not being as powerful as he once did. It also serves another purpose as a beacon of sorts, I do not know why but I have a theory that it involves Celestia, the abode of the deities of Teyvat.

A Gnosis can be seen as a power source, similar to a nuclear reactor but without the danger if unkempt. Rather, it would only be dangerous in the hands of someone else. Electro has managed to find a way to use his Gnosis to attain a way to enter the metaphysical realm of the Archon hall, although I suspect that my electro counterpart's other half helped him. 

The gnosis is the counterpart that Teyvat has to Earth's Herrscher cores. Just like Gnoses, Herrscher cores allow their user to control an element. The difference is that while Gnoses (presumably) allows its user to act in accordance with his desire, the bearer of Herrscher cores is, in one way or another, under the influence of the being known as the Honkai. 

By their own, Gnoses pale in comparison to the Herrscher cores. After all, the Herrschers themselves can control concepts and reality as long as it is related to their elements such as the Herrscher of Reason's ability of creation as long as they know how it works. 

However, a battle is not won by pure might alone. 

In fact, in terms of pure combat ability, the archons of Geo, especially if they have undergone what I call the "Bleeding process", will be more than a match against most of the Herrschers without preparation. 

Concepts

In terms of concepts, the elemental Gnoses have their own concepts, imprinted onto them by their former owners. Sadly, the more compatible one person is to their gnosis, the more powerful their compulsion to their concept will be. 

My elemental Gnosis of Anemo has the concept of Freedom imprinted on it. It has influenced my desire to be free, to be unbound. Unbound by notions and bounds that tie my potential. I have broken my chains. 

The elemental Gnosis of Geo has the concept of contracts imprinted into them. The holders of this Gnosis are more often than not, loyal to a fault. Binding themselves in accordance with their 'contracts', one-sided or not. 

The elemental Gnosis of Electro with the concept of Eternity. Its former owner and possible consciousness, Makoto Raiden, still lives and has become engaged to my Electro counterpart. 

Dendro, the element of wisdom. While not the strongest in straight fights, their abilities make them the worst kind of people to fight. Especially since their most terrifying ability to analyze and pick your entire being apart in their samsara. 

Hydro, the element of justice. While they are regulars in their place, they value justice above all. Thankfully, that counterpart of mine that became the archon of this element is more of a 'humane justice'. 

Pyro, the element of war, is handled by a version of myself that is confusingly peaceful. No, to call him peaceful is to underestimate him. As pyro is the element of destruction, his capabilities in martial arts alone might even match Rex Lapis' own in terms of pure martial skill. Despite this, he wishes not to fight but to spend each day relaxing yet when push comes to shove, he would be the first one to enter the battlefield, leaving nothing, not even ashes, in his destructive wake. 

Cryo, the element of love. Perhaps, the most peaceful of all of the archons. For someone whose element revolved around the concept of love, Cryo himself is quite dense. A pacifist at his core, despite this, he is strong enough to even freeze time itself. 

Of course, each one follows their own path.

Cerberus himself follows the path of preservation. He focuses on the protection of those around him even at the cost of his own. Despite not being an archon anymore, it seems like an Aeon gazed upon him. Honestly, it is quite a tiresome affair so why bother? 

Electro himself walks the path of Harmony for it is required for him to be in complete harmony with Makoto to achieve his full potential. While not as bad as Cerberus' path, why does he need to rely on Makoto? Well, he is a simp.

Dendro walks the path of Erudition and remembrance. He is basically a giant nerd that would rather stuff his nose into countless books every day. Quite boring at parties. 

Hydro walks the path of Abundance. He's basically just an overachieving humanitarian. I mean, if given the chance, he'd literally just purify a heavily polluted water source. At least sell your services or something. 

Pyro walks two paths like Dendro. Pyro himself is a path-strider of Destruction and the hunt. I don't have much to say to him other than he really should at least try to commit to his paths, but someone made him learn why he is a Pyro archon once. 

Cryo walks the path of... Elation. Yeah, this guy is just a dumbass with ice powers. I mean, he literally got rejected by a LOT of women. Man failed his Rizz check so much that I'm pretty sure he lost it a while ago. Probably is something like Sheogorath now. 

For me, I am Anemo and I am Rex the unbound. I walk the path of Nihility. Why? Because I am awesome like that. After all, the only thing  that matters is me, myself, and I

====

This is not a part of the book, well this is semi-canon to the stars are for you. 

If you guys want it, I can make a book where Anemo (Anemo Archon Rex) is the one traveling with the Astral Express. 

Omake: (this one is canon) Cold troubles

"Hey," 

"What is it March?" Dan Heng asked the pink-haired girl who only looked at how Cerberus completely remained unfazed by the cold weather. 

"I mean, I can use ice, and most of you are either used to the cold or have jackets but why is Cerberus not affected by the cold? I mean he managed to catch up to us back in the overworld despite there being a blizzard outside the city?" March said catching the attention of the group.

True to her words, Cerberus stood ahead of the group, his blazer shared with Stelle and Seele. The former archon of Geo was nonchalantly smoking a (somehow) lit cigar with his sleeves rolled up to his elbows while several buttons of his shirt were open. 

"Want to ask Mr. Welt?" Stelle offered as she took her phone out, taking a picture of Cerberus. 

Stelle: Mr. Welt, do you have any idea how Cerberus is not affected by the cold weather?

"Why can't we just ask him?" Dan Heng asked, not batting an eye as March covered herself with his jacket. 

"Because he won't answer it!" 

Mr. Welt: Oh? Well, Cerberus is special and he has a lot of skills. In fact, his family once produced a warrior known as the winter king, and his techniques were passed down to his family and their descendants. 

"Winter king?" Bronya asked, looking at the back of the former Geo Archon.

Mr. Welt: Although, knowing him, he is probably using a barrier around his entire body that protects him from the cold

"I knew it!" March said! Getting out of her position between Dan Heng's jacket and rushing towards the former archon. She would have done so if it wasn't for Cerberus turning around to look at them, a death stick in his mouth. 

----

Omake: (canon) Curio shenanigans

Inside the Herta space station, 

Cerberus blinked as he looked at the shelved curio in front of him. After all, it was once his weapon. 

"Where did you get this?" The former lord of geo asked Herta as he kept his focus on the broken sword in front of him.

"It was sold in Shenzhou Lafou," Herta said as she looked at Summit Shaper. "What is it to you?" 

"That's my sword," Cerberus said as he eyed the weapon he once used, 

"I can give it to you IF you agree to be my-"

"You did that on purpose!" "Woah!" A toddler that looked a lot like Cerberus suddenly popped in front of him in an amber hologram-esque fashion. before whacking the amber spear on the ground several times. "Bleh! You can't kick me, dumby Cerby!" Reese said, sticking her tongue out and pulling her eye at the spear, the 5-year-old ran away back to the estate.

Seeing the girl trip, Rex did a facepalm as the others looked at him in confusion

"What was that?" Marcha asked while Stelle noticed how the girl looked similar to Cerberus without the hooded cloak.

"Reese Crozzo," Welt Yang whispered as he saw the toddler. "She's your successor? " 

"No, not her. But I did lend her a portion of my reserves." Cerberus replied as he winced at the second-hand embarrassment of his niece tripping. "I still can't believe Rein had a kid with her," Cerberus said, shuddering at the idea of that woman and his brother.