Founding Titan (Anime)

The Coordinate (座標) is an incredible power over the Titans which is being sought after by the Warriors and Rod Reiss, and is used by screaming. It is also described as the royal family's power (王家の力). It is currently in the possession of Eren Jaeger.

Abilities
The Coordinate enables its wielder to control the Titans by screaming. It has been observed that Pure Titans simply obeyed the orders given by its wielder while Intelligent Titans can sense its use, though they are seemingly not influenced by its control.

Clash of the Titans arc
Before fleeing the Scouts in the Forest of Giant Trees, Reiner states that the connections between the Reiss family and the Order of the Walls make Historia Reiss a valuable asset for the Warriors' mission, and having her with them will make their goal much easier if Eren Jaeger is not the "Coordinate" they are searching for. Later that day, the Warriors' suspicions are confirmed when Eren unleashes the Coordinate, striking the hand of a smiling Titan, screams, and causing all the surrounding Titans to swarm it and tear it to pieces. When Reiner and Bertholdt approach him afterward, Eren's outburst once again triggers the Coordinate and sends the nearby Titans rushing towards the Warriors, allowing for the Scouts to escape. On the journey back to Wall Rose, all Titans encountered ignore the Scouts and instead run in the Warriors' direction under Eren's subconscious orders.

The Uprising arc
A squadron from the Military Police led by Kenny Ackermann kidnaps Eren Jaeger and Historia Reiss and brings them to Historia's father, Rod Reiss. After reading a note from Eren on how Ymir got her Titan powers, Hange Zoë theorizes that the government is going to devour Eren to gain his power.

Eren awakes, chained up and gagged, in the Reiss family's Underground Chapel, where the power has been passed down for generations.

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Koordinate (Anime)