C.Tatsu would laugh as they keep moving through the halls, well then... Let's bring out a Persona, the bomb that would level the building was actually a lie, but he's not going to tell these idiots anything about that. Instead, he'd walk over to a window and focus his energy, in a moment a large sea serpent takes shape outside of the window and begins dashing doward, C.Tatsu easily controlling his Persona and sending it down to the hallway two of his foes are in.
"You guys may be wondering where the bomb is, and I'm sorry to say that's not info I plan on giving out! I hope you enjoy playing with your friend though! His name is Leviathan, and he's a fan of long swims in the sea, causing tidal waves, and devouring people alive!"
The two swats in the hall would quickly be set upon by the beast, massive waves of water taking shape in front of it and blocking the whole thing. Any bullets they sent toward their foe would quickly find themselves slamming into the water and losing speed, by the time they hit the Persona's scales would easily absorb any damage. As that happens, the beast would begin to surge forward and attempt to pluck one of the men into its large jaws, if it hit it would then happily devour him before turning an eye upon the other swat member.