Charlatans

It's not that Emile can't feel the immense pain coursing through his body, or the unbearable toll which strains his mind beyond comprehension. The perfect individual simply cannot show weakness at any moment, no matter the circumstances, and that's all that matters. He may need to drown out any sensation through the flood of the endless, crashing ocean of madness within his head... but that, too, is something he's become accustomed with.

Though it is unclear if UA-566 ever felt pain or stress, the host body certainly performed worse as it continued intense testing. Now, however, UA-566 seems to be capable of ignoring all of circumstances that might stress or harm another person. Be advised, bullets are no longer a strong deterrent to the creature.

You lack the gift of feeling pain, you only feel numb, nothing. You march forward despite the punishments.

Time passes, and Tachibana learns new ways to cope with pain..

As a Candyman, one must be like all candies. And in the world of candy, no sweet is tougher than a Jawbreaker. It lasts for hours. Bismarck has learned to carry the mindset of one, and now resists his pain just the same as a Jawbreaker lasts in the mouth for hours. His gob-- or rather, his self-- cannot be stopped (Ha!). An autopsy or similar investigation reveals that his pastry brain has chunks of jawbreaker strewn about in it; a sort of cake-candy mixture. His skin, too, has tiny pieces of red, blue, and yellow color that are typically seen in jawbreakers.

The mobster's been through tougher scrapes than this. A few cuts and bruises won't stop them.