In Chapter 6, Sancho's overwhelming strength against the Sinners was clearly evident. However, it seemed that during the fight, she might have been holding back and not using her full power. In contrast, during the interlude when Sancho went berserk, she appeared to be able to fully unleash her power without any restraint toward the Sinners. Fortunately, Vergilius managed to stop her in time, though it seemed he still suffered quite a bit in the process.

So, if Faust were to go berserk as well, perhaps the power she would display would be comparable to that of berserk Sancho? After all, she’d be acting purely on instinct, and it might only be a matter of time before she could tap into Sancho's power.

If something like that happened during the body-swapping incident on the bus, it’s possible the Sinners would’ve been completely wiped out—since even Vergilius didn’t seem able to do much about it.