And thats due to the color incident, they mention it in the w-corp janny book in Ruina
>But sometimes, the cleanup crew isn’t enough for the job. What’s so scary about dealing with humans, you ask? I heard this story from my seniors… One time, a Color hid their identity and snuck onto the train. What a shocker that must’ve been… It’s our rule to stop powerful people like Colors or key members of Associations from boarding our WARP trains, or to guide them to take First Class seats if they must board the train, for a safe and smooth restoration process. We want them to sleep without a care instead of joining in the chaos of the other carriages~ That Color Fixer was super tricky to deal with, they told me? Most passengers started training under the Color’s guidance in order to attain some kind of enlightenment. All but a few of our agents were pulverized by those people before they could even see a glimpse of the Color…
>But, we aren’t totally powerless against those situations. We would’ve gotten into so many problems otherwise, yeah? In case things get too difficult for our agents to handle, we call R Corp, a Wing we’re partnered with. I saw footage about R Corp. in our training course… They were so cool. That was my first time seeing the mercenaries in action! They’d keep pressing on and wipe their targets, no matter how harsh their resistance was… I was like, whoa, they really are something else. The Fourth Pack… Was it called the Rabbit Team? Yeah, I think it was. I gotta wonder, though; why rabbits of all animals? Isn’t that an herbivore?
