Isu is a highly developed humanoid race in the ancient times of the earth, and is the creator of the fragments of Eden and even the entire race of human beings.

Part of the unique genetic structure of Yishu members is manifested as having a triple-helix DNA structure and six basic sensory perceptions, which are completely different from the humans they created, which have a double-helix DNA structure and five basic sensory perceptions. Another characteristic that distinguishes Ishu members from humans is that Ishu members have highly developed intelligence; this also allows them to survive longer. Therefore, the Yishu members who created the human beings simply wanted to use human beings as tameable work force. Above this, it is believed that Yishu members modified the genes of some human organisms through fragments of Eden, creating humans who are anatomically similar to themselves and theirs in terms of anatomical structure in addition to their height and head capacity. Therefore, early humans could not understand what the members of Ishu were, mistakenly regarded them as gods and respected and worshipped them.

Yishu

Because of their long and rich history and the various influences they have left behind, the Yishu race is known to human civilization under many different names. They were named by the Absteg industrial classification as the Homo sapiens divinus, and were also called "Those Who Came Before", "the First Civilization" or "the Precursors". In addition, specific groups of Ishu members, such as the three gods Capitolini, are considered by most human religions as part of the gods.

Although Yishu is an indigenous race on Earth that has been evolved over tens of millions of years, its specific origin is still unclear. Minerva simply described his race as "arriving earlier" and said that Ishu created the Homo sapiens, which determined the appearance of these capable and easy-to-tame labor forces according to his own image. At the same time, Ishu also created the Neanderthal race—used as human power used in expeditions and military forces.

Although Minerva claims that Ishu gave them the ability to survive difficult circumstances in creating humans, Juno reveals the fact that they do not want humans to be "wise" - this will ensure that humans continue to be obedient and humble animals that meet the needs of their creators.

Yishu members extremely radically replaced the genetic composition of some existing primates on Earth and created humans and brought their appearance closer to themselves. Therefore, this genetic replacement has led to a great gap in transition species between ancient and modern humans. In 1997, the Templars realized that this information might be harmful to the theory of human origin, so they planned to forge the skull and placed the forged skull at the scientific expedition site in Ethiopia, barely solving the problem caused by evolution and avoiding the possibility of Yishu's existence.

The ancestor of human beings"Lucy”

In order to ensure control over humans, Yishu created various technologies and artifacts that later became known as "Fragments of Eden" by humans. It is believed that certain fragments of Eden can instantly affect the neurotransmitter network deep in the human brain, and can ensure full human obedience through remote control. However, some humans are not born with this neurotransmitter. The lack of this neurotransmitter also leaves them immune to the mental control ability of the fragments of Eden.

Yishu is a highly developed and powerful race with natural and technological foresight. In his letter, Altaïbn-La Ahad mentioned that the fragments of Eden he owned not only contain a catalog of past events, but also future events, indicating that the fragments of Eden contain prophecies of Ishu members.

It is obvious that Yishu has a connection with many human religions and has obviously had a direct impact on the development of religion. In his warning to Desmond, Minerva mentioned the names she and her "god" colleagues had once known: Merva, Uni and Tinia. They were later respectfully called Minerva, Juno and Jupiter. Their former names correspond to the names of the three Etruscan gods. Later, the names were the names of these three gods in Roman mythology, collectively known as the "Three Gods of Capitolini". This name change may explain why various religions have a lot of similarities—because they all come based on the story of Ishu.

Jupiter, Minerva, Juno

As a biological species, the anatomical structure of the members of Ishu is very similar to the humans they created. But unlike humans who were born with only five senses, Yishu members have six senses. The so-called sixth sense is actually simply "knowledge". Although it is believed that the individual members of Yishu are taller than humans, it is unclear whether their skull structure can prove this. In addition, although Yishu members have a long lifespan, they are not immortal.

After the Toba Catastrophe that led Ishu to the road of extinction, Ishu members worked together to deliver the sixth sense to humans, or to awaken the sixth sense, as their "last remaining hope". But in the end, they failed; although humans were able to "see the blue light (and) hear those sounds", humans did not fully grasp the "knowledge" that their creators had. This fact then convinced Juno and other Yishu members, and humans should directly remain as they are.

Although leaving traces on the earth, Yishu himself disappeared into a blurred view of human cognition shortly after his death. However, human beings cannot understand the behavior of the creator, which makes the members of Ishu regarded as gods, and their names and characteristics can be passed down. In addition, although the evidence for Yishu's existence is very lacking, some people have discovered the true nature of these evidences in the long river of human history. By the twelfth century, the Knights Templar had a very limited understanding of the species Avant-garde. In fact, the 20th generation used to explore the genetic memory of individual ancestorsAnimus, a technology used by Yishu to record gene memory.

Although various religious beliefs seem to be based on impressions and misunderstandings about Yishu, Yishu's own existence is almost unknown. As early as the twelfth century, the Knights Templar speculated that the core of human religion and many gods did not exist. The so-called miracles and other supernatural events were just misunderstandings about the power of the fragments of Eden created by Ishu to control humans. But it is unknown how the assassins and the Templars understood the origins of these artifacts at that time.