They all had a past that wasn't the Circus. Shiro didn't remember his at all, beyond the occasional nightmare that woke him screaming and left him shaking for hours afterward without remembering why. But he knew they all had a somewhere they'd been before here. Because each new arrival that showed up had come from somewhere. Sometimes something would jar a memory loose and one of them might remember a fragment of that past. Door's shake though tells him its not the case with her. He reaches up to rub one of her ears soothingly between his thumb and fingers.

Just because she doesn't remember doesn't mean she's wrong. He trusts his instincts. They know more than he does. Hers too. He doesn't like the feel of the two she's pointed out but he knows that's not enough information to go off of. A lot of evil drifts in and out of the Circus, enjoying the view as a guest before being left behind. A lot of predators. Shiro lets his hand fall back to rest against her side and frowns. The Circus plays by very specific rules and the rules about guests are fairly clear. They move outside his sphere of interest but also outside his sphere of influence. He can't do anything unless they do.

"Acrobats." He murmurs it low, voice like gravel. Her shoulder gets a pat and he stands up. "Let's see what the acrobats can find out about them."