"As strong as is necessary." It takes more than a mere mortal to destroy one of Rokuro's barriers, he has protected himself and others against an onslaught by actual gods, however... this modern weaponry is almost god-like in its capacity for destruction. No human should have the power to mow down an entire army with just a twitch of his finger.

A deep breath, fingers spreading as he widens the barrier to surround them both. He's focusing on density rather than size, and so it will be a tight squeeze, requiring them to stand back to back, but the shell of the bubble will thicken.

"It is possible for me to kill them without much effort, but to do so I would need to drop the barrier, and I am not certain I am faster than their weapons. I have never seen such a monstrous firearm." Rokuro can stop a man's heart mid-beat, but can he do so before said man pulls the trigger? It's difficult to make predictions in a world he doesn't understand.