In order to come to terms with his own negligence and revive Shion, Gobta, and his other fallen comrades, Rimuru reveals that he used to be a human. But his allies think nothing of it and accept him regardless, as if it's the natural thing to do. Filled with gratitude for the warm, accepting environment he's in, Rimuru turns his focus to the army from Falmuth. He entrusts Benimaru and the others to destroy the devices that are generating the enemy's Prison Field while Rimuru himself sets out to attack the advancing army and use them as nourishment to become a Demon Lord.
This happened because we 
all let our guard down,
،حدث هذا لأنّنا جميعاً قد تهاونّا
Der Grund war unser aller Nachlässigkeit
Esta tragedia es el resultado
de nuestra negligencia y debilidad.
Esta tragedia es el resultado
de nuestra negligencia y debilidad.
Ce désastre fut causé
par notre imprudence à tous,
La colpa risiede nel fatto 
che tutti noi abbiamo abbassato la guardia
Este incidente é resultado
do descuido de todos nós,
К трагедии…
привела наша общая расслабленность.