The
Etherlite (エーテライト,
Ēteraito?) is a
Mystic Code of the Eltnam family. It is an artificial nervous system constructed of ether and a nano-scale filament a micron thick with a maximum range of five kilometers, connected to her through a bracelet. Sion uses it like a whip to slice and entrap opponents during battle, but its true use is in attaching to the opponent's skin to integrate with their central nervous system and read their thoughts and memories. It was originally intended as a substitute nervous system for use by surgeons, so it can substitute destroyed nerves. The mental link formed between the user and the target has made the Eltnam name become synonymous with
Spiritron hacking. Though others find the thought-reading function to be vile in itself, it carries the even more dangerous ability to "merge with and copy memories and experiences." Thought of as inhumane and demonic even by Atlas, the "acquisition of another's life" is a technique unique to the Eltnam family, they are scorned and feared due their creation and use of this Mystic Code. It can also be used to draw in information of her surroundings by spinning in place.
Attaching it to and removing it from an unknowing target is easy due to it being like a thread unable to be seen with the naked eye, giving her the ability to compel and coerce the human nervous system of the target. It is a true talent to completely invade and seize another individual through thousands of barriers like reason and instinct. Taking over the person's "hardware", it hacks into the only control center of the body, the brain, and becomes a second control center. Thought directs the body, so it hacks into that process and sabotages the original. It penetrates to the deepest level of the person, hacking orders to the body that believes came from its own brain. It instantly seeks out and fuses with their nerves, and its length is enough to easily fill a human body. It can be thought of as hacking both their mind and body, allowing her to either simply read their thoughts or have complete control of their actions.
It takes information from the brain to "create a blueprint of the soul" from which thought processes are derived. While other methods of collecting knowledge can damage the information and possibly the target, Etherlite does not leave a scar in the mind or negatively affect the brain. The thoughts can be invaded, downloaded, and rewritten without the target knowing at all. While it can move their body without their input, it is possible to resist commands to an extent. It is not fully mind reading, but instead the ability to read the subjects and verbs of the thoughts, minus the conjunctions. It can easily track a person so long as they are connected to it, and it cannot be removed by the target without frying their nervous system and body because it is considered a part of it. It would not be effective against a target like a
True Ancestor, but she can easily send electricity to destroy the brain of a normal human and likely kill them with pain even before nerve damage begins.
The manga includes the ability to release the limiter on a person's nerves to greatly increase their physical ability as a last resort. Due to going over their normal limits by releasing the body's restraints, it puts large strain on the them and can not be used very often. Once the limiter is enabled again, the target is left unable to move for a time.
