The worst case...let's not think about it. Let's just hope Melty is also a target of the lust-controlled Firo. It would've been dangerous if she was controlled by gluttony.
"Atla, how is it?" (Naofumi)
"Yes. I felt the enclosure cast by Naofumi-sama block the ominious power." (Atla)
"Is that so!?" (Naofumi)
That's good. In other words, Firo will return to normal while in the prison. Melty did a good job too.
"The prison made by Naofumi-sama is simply wonderful. There are still a few frayed spots, but the ominous power has been obstructed." (Atla)
"Ohh..." (Naofumi)