R0 Nemesis bulletproof

It was a colossal mass of necrotic flesh. Jaundiced skin was pulled tight over its bloated muscles, constricting it into some parody of a corpse. Somewhere along the way this thing, once human, had become an awful monster dragging its head across the ceiling. Each step shook the ground like a thunderbolt.

Some cops kept their guns trained on the monster, but couldn't find the strength to pull the trigger. Others let the metal slip through their fingers and clatter on the floor. Only one of them, a senior officer maybe, kept composure enough to fire. Five shots until it clicked, each bullet thumping harmlessly against it without even penetrating.

[...]

By now the remaining officers had gotten the hint to flee, some firing parting shots at a monster completely immune to them. Just Chuuya and Hale, alone with the creature.