Founding Titan

"Frieda's Titan stood at the apex of all others, in other words, a Titan that held an invincible power."

- Rod on holding the Coordinate The Coordinate (座標) is an ability that is most recognizable for allowing the user to control Titans. It is currently in the possession of Eren Yeager.

Description
This power is a composition of three different abilities.

First and most noticeable of all, the Coordinate power grants the user the ability to control the Titans at will and make them follow virtually any order. This is seen when Eren unintentionally commanded nearby Titans to eat the Smiling Titan and to attack the Armored Titan when he punched it's hand and he yelled at Reiner. It was also used by the First King to build the Walls, making Titans harden their bodies and confine themselves into the resulting structures. The real limit of this power is unknown, but as it can be observed, it extends to the point of making Titans perform actions that threaten their own lives. It has also been mentioned by Rod Reiss that the power is so strong, it has the potential to wipe out all the Titans if the user is able to wield it to its full strength.

Secondly, the Coordinate allows the user to erase or modify the memory of a single person or even those of entire countries if they are skilled enough. It was used by Frieda Reiss to remove Historia's memories about her, and by the First King to make humanity forget all the history of the world before the building of the Walls. However, it is known that at least the Ackerman bloodline, the Asian races and the noble families are immune to this mental manipulation, which caused the persecution of the former two at the hands of the monarchy.

Finally, the power allows the user to inherit the lost memories of mankind and those of the previous users, giving them omniscient-like knowledge about the world, such as the reason the Titans exist and how the Walls were created. Nevertheless, it seems that only the Reiss bloodline can activate this ability from the beginning, since Uri and Frieda Reiss showed signs of being aware of that knowledge immediately after obtaining the Coordinate, while Eren has just unlocked some vague memories after years of having received it. However, so far Eren only remembers memories from his father and one memory of Frieda and not any other holder. The user is referred to as the living book of humanity because of this.

The overwhelming extent of these combined abilities makes the Coordinate to be referred to as the "invincible power", and the user to be called "God", as stated by Rod Reiss.

Even so, it is noteworthy that, despite the fact that all of the Coordinate users could use this power to easily wipe out all Titans and free humanity from their struggle if they wanted, and despite many, if not all the wielders have expressed the desire to do that before obtaining the ability; once they receive the memories of the events that led to the invasion more than 100 years ago, all of them have finally decided to do nothing, and not even want to reveal the reason to anyone, showing a silent concern and culprit for the knowledge received. Frieda Reiss used to suffer from fits of madness and depression due to those memories, and claimed that humans were sinners who deserved their punishment. This was because since up until Grisha stole the power, all the users were part of the same bloodline and therefore fell under the First King's ideology, which was noticeable in the user's dark, vacant eyes. Frieda displayed this when she performed certain actions that were associated with the previous holder's such as telling Historia not to go over the fence, thereby meaning not to leave the Walls and when she talked about love and peace during her first meeting as the true queen.

Like Titan Shifting, the Coordinate is apparently not inherited by bloodline, and the only way to get it is by eating the previous user. This is usually done by using a serum to transform into a Titan, then eating the holder and thus regaining human form, plus obtaining the Coordinate power. This means that all the Coordinate users have been also Titan Shifters.

The Coordinate originally belonged to the Reiss royal family, which passed it down generation to generation through the previously described process. The known holders of it were Mr. Reiss, who passed it to his son Uri and Uri, who passed it to his niece Frieda. However, seeing that they would never do something to stop the Titans despite having the capability, which allowed the invasion of Shinganshina and the death of his wife, Grisha Yeager stole the Coordinate by attacking the Reiss family in his Titan form and eating the former wielder, Frieda. He then transformed his son Eren into a Titan and allowed himself to be eaten by him, so that he could master the Coordinate without the memories and influence of the Reiss bloodline and accomplish the goal they never did.

Trivia

 * The Coordinate, as well as other Titan abilities, is retained in the user's spinal cord, so it is not necessary to actually eat the whole wielder to obtain or transfer the power.
 * According to Rod, this power can only be used to its full potential by a descendant of the Reiss family. That is why Rod tried to have Historia eat Eren, due to the fact that she was the only remaining heir of the Reiss bloodline. However given the manipulative nature of his speech, it is unknown if this is actually true.
 * It is currently unknown why the Ackermans, the Asian groups and the noble families are the only people unaffected by the Coordinate's memory-erasing power.
 * The agents from the Homeland speak of the Coordinate as being stolen from them, possibly meaning that it belonged to the Homeland first.