Arkin

People who were born with L.U.C.Y Gene and have had their entire bodies successfully replaced with Ethraksha are called Arkin.

History
The L.U.C.Y gene is something added to human DNA by, you guessed it, L.U.C.Y herself during the Divine Blessing. If activated, or "awakened to", the gene makes the body slowly replace itself with Ethraksha and gives a person the ability to Program it as they wish, making that person effectively Immortal, Invincible, and on the same power level as L.U.C.Y (pretty much a god).

Everyone's L.U.C.Y gene is unique and anyone can awaken to theirs, but at an extremely low chance and at a random stage throughout their life. For some odd reason, there was a massive spike in Arkin awakenings during Era III.

The Great Kings, Shuichi and Shuji Tsuneo, were the first people on Arcerra to awaken to this latent power. As others also awoke to this power, they began to call themselves the Arkin, Kin of the Arcane

But, as the centuries went on, only a few Arkin were immortalised within the history books. They were the Great King's personal troupe of similarly-powered Arkin, known as The Elementalists.

Failed Awakenings
Once a L.U.C.Y Gene is awakened to, it takes anywhere between several months to decades for the process to fully complete. As with everything else to do with Programming Ethraksha, there are risks to awakening to a L.U.C.Y Gene. Failing to fully awaken will either turn you into an Eidolon or leave you with a severely inhibited version of your Magic System. The faster the awakening, the higher the risk of it failing is. A failed awakening is usually only dangerous if it takes less than four months, which usually never happens anyway.

Universal SImilarities
Without getting too specific, most Arkin have powers on the scale of: throwing around planets and shit, turning the air into mercury, ripping holes in space, creating black holes that only pull certain things in. Stuff like that.

Other powers vary depending on their Magic System. The abilities I'm about to mention are universal to all EBOs, not just Arkin: Since they have the ability to Program their own Ethraksha to an extent, this means that they can also remove and regain any of these abilities whenever they wish.
 * Don't need air to stay alive. Well, they don't even breath so they don't really need air in the first place.
 * Can survive in a vacuum.
 * Don't need to (can't) eat food or drink water to stay alive.
 * Can be split apart and reattached as they please.
 * Can survive extreme living conditions.
 * Unaffected by Gravity.
 * Cannot feel temperature.
 * Most of them can manoeuver freely through the air.

Not really a power but most Arkin are disconnected from the rest of humanity, such is the cost of power as great as this.

Magic Systems
In addition to the abilities listed above, Arkin also a set of personal abilities called a Magic System. How a person's Magic System works is mainly decided by their L.U.C.Y gene, which means that every Arkin has unique powers.

The way in which Magic Systems work is a complicated and intricate thing to study, so there'll be details for each System on their own page.

The powers of a Magic System can be passed down to offspring.

"Weakness" to Pallobalt
Arkin are made of Ethraksha, which means they can be absorbed by Pallobalt. But SINCE THEY'RE ARKIN, most know that they can Program themselves to forcefully eject out of it whenever they get absorbed, or to simply be repelled from it entirely.

List of All Arkin
Very obviously not complete yet. † Means that it's a placeholder name

Shuichi and Shuuji Tsuneo
The two brothers who went by the name of "The Great Kings". Born from a small village in the centre of Arcerra, these two were the first humans on the continent to awaken to their L.U.C.Y gene. Renowned throughout Arcerra as gods and heroes. Creators of the Artifacts. Founders of Tsunia, which is named after them.

Crimson Knight (†)
A Blood Mage who possessed Hemomancy, Tears of Infection, and Fleshstepping simultaneously. His power was amplified and purified when he became an Arkin. Joined the Elementalists, the Great King's personal troupe of like-minded Arkin. His descendants are all users of a Blight/Flow System hybrid.

C.G(†)
A delusional teenager who made an enemy of the Elementalists and paid the price dearly. became an Arkin after years of delusionally thinking he was already as powerful as one.

Mega Hobo (†)
Some homeless guy who becomes an Arkin towards the end of the third Era. He tries to defeat Elementalists because of some conspiracy that they rule the continent from the shadows (true). He becomes a legitimate threat, but he died anyway.

Cinnamon and Syrup (†)
The Great King's rivals. The strongest Arkin that aren't on their side. They just as famous and well-liked as the Great King's, but they were only interested in causing mischief. They end up being executed in front of the entire continent.

Peyon (†)
The leader of the Scientific Advancement Council back when they were just a small group of starry eyes pioneers. He created the Archive System, the Ethrnet, The M.E.E.T Converters and the Arc-Electro Translator. Killed by Blind Visonary.

B.V
The Blind Visonary. Rose to power in the Scientific Advancement Council after he killed Peyon. The organisation's fall from grace begins here.

Hellman (†)
The Arkin who had their powers stolen by the Great King's so they could create Ormudomaigo. He's still in hell right now.

D.T (†)
Poor soul. The Great King's had an argument with an Arkin who they didn't like (this one), so they trapped him inside the a.i of a new task force robot they were developing. Then they mass-produced like a thousand of them, all with copies of his tormented soul inside of them. So after Era III ends and there's only like one left, it persuaded Beatrix Tilt to become a King's Agent and repair him. By "repair" he meant "Take him to where a full copy of his Programming should be". We know how the rest goes.

The Biologist (†)
The Arkin who noticed the changes that The Original made to life on Arcerra.

He decided that there was no way certain animals just suddenly evolved to have two extra hearts and metal skeletons. There are animals that had singular hearts and normal skeletons, so it was obvious that the changes made were done with the recently discovered Tomahtra a LONG time ago.

He was also a person who strived for humanity to stand at the top of all things. Even though he was an Arkin, a God amongst men, he still had compassion for them. The Biologist wanted humanity to become as physically capable as possible without altering their DNA.

With permission from the Great Kings who "thought it would be fun", they gradually increased Arcerra's gravity every day for a few decades. He saw that people were only really bothered when Gravity went above 16N. So he set it to 16N and called it a day. This is why gravity is stronger now.

The Wanderer (†)
lets see. "A man who didn't know he was an Arkin who lived for a long ass time." What could I do with that.?

Him, Upstairs
A nameless, solitary Arkin who desired to be completely isolated from all that proto-god stuff. They hid in their attic by using Ethraksha to stop anyone and everyone from being able to contact them, but a chink in their Programming gave anyone travelling up a flight of stairs a small chance of being teleported to him. Him, Upstairs doesn't mind this though, since he's become an urban legend and people bring him gifts and shit.

Trivia
People with 100% Bonus ethrA can also be considered as Arkin, except that they're limited to whatever Magic System they already have, unable to create one for themselves. This only applies to Hiro Taganis, the only character who has 100% EthrA.