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.
but the fault for failing to stop this 
tragedy before it happened is mine.
لكن غلطة الفشل في منع وقوع هذه
المأساة قبل حدوثها هي غلطتي
Und die Schuld daran, dass diese
Tragödie passiert ist, liegt bei mir.
y yo permití
que ocurriera esta tragedia.
y yo permití
que ocurriera esta tragedia.
La faute est mienne
de n’avoir pu prévenir ce massacre.
ma è colpa mia se non siamo riusciti 
a fermare questa tragedia prima che avvenisse.
A responsabilidade por
este desastre é minha.
И в том, что эта трагедия произошла…
виноват только я.