Age: 15 Gender: Unknown Height: 157cm Affected by the deaths of the prisoners, they have cast aside their guard's cap. The previous outbursts of anger have faded, replaced by a calm demeanor as they attempt to converse with the prisoners. When extracting mental images, they no longer use prisoner numbers, instead calling the prisoners by their names. During the interrogation with Fuuta, Es mentioned that there are other entities present when they vote, confirming that Es is no ordinary guard. In Mu's interrogation, they even refer to themselves as 'everyone,' suggesting they have fully accepted this collective existence.