Cradle

Cradles, also known as growth modules are objects in Xenoblade Chronicles 3. Kevesi and Agnians are born from them.

Description
Cradles are spherical pods with orange liquid inside. Kevesi and Agnians are born from them in their respective Castle, Keves cradles are located in the Throne Room whereas Agnus cradles location are not disclosed in the game. First appear as a fetus, then quickly grew to artificially aged to resemble a child. If a Kevesi or Agnian die by any means other than Homecoming, they are born again in the same cradle they were in as part of the cycle of rebirth. Even though most cradles are located in Keves Castle and Agnus Castle respectively, there are still some cradles stored outside of the Castle, such as in the City's Module Warehouse, and the Lost Colony.

Cradles don't seem to able to release soldiers automatically, there has to be an individual to interact with the cradle in order to release the soldier inside, as how Ethel was accidentally released by Cubibi during a game of hide-and-seek. Cradles are also movable, as the Lost Numbers has seized many cradles from Keves Castle and cradles were being carried to the Cradle Convoy Shelter at the Great Sword's Base.

In Colony Omega, there is also a special type of cradle that is able to accelerate process of a soldier's growth to their final term. Consul Y utilized this cradle and revived many soldiers, including Mwamba, Hackt, and Cammuravi.

Story
After the battle at Everblight Plain ended in 's victory, Kevesi soldiers are seen being created in the cradle at Keves Castle, while Noah is describing how every soldiers are born like this.

The party arrives at the Throne Room while escaping Keves Castle after destroying the Annihilator, Noah spotted several cradles with Ethel's cradle being among them, shocking the entire party. After their battle with the Queen of Keves and found out that the Queen was a fake, the Lost Numbers storms into the Castle and looted many cradles, including Ethel's.

Once the party arrives at the City, explains to the party how the soldiers are bounded by the shackles of Moebius, by being reborn after dying and awaken without memories of their former self. As for the reason of not awaken the soldiers in the cradles to aid the Lost Numbers. Monica explains that even though the soldiers will be free from the Flame Clock once awakened, the soldiers will still have short life spans and they don't know how long the battle with Moebius will last, and she also want them to be awakened in a world where they can find their true selves.

Once Cammuravi reunites with a first termer Ethel in the City, returning to Colony Omega with Cammuravi with the Seraph at Rank 10 will let Ethel use the cradle to mature her back to her tenth term.

Trivia

 * Ethel is the only Hero to have appeared in a cradle.
 * The newly born soldier's character model in the Kevesi cradle shown in the first cutscene was reused in the cutscene where Isurd and Nimue was looking at the Lost Colony's cradle.