Chas listened to what John asked of him. He didn't like the idea of keeping something from Serena when they were trying to make the girls feel safe where they were, but he nodded his agreement nonetheless. As the door opened he noticed it was a shadow that opened the door for them and he couldn't believe how many scars adorned Serena's back, quickly looking away as casually as possible. With Serena starting the talking with mentioning the spirit from last night, his eyes went slightly wide in surprise that she knew of what had happened. Only finding her explanation of the shadows making it suddenly click into place in his mind. He couldn't believe for a split second that he forgot she could actually communicate with the shadows she was linked to, thinking it should have been obvious how she knew what went down without them needing to ask. He didn't like the idea of yet another thing coming after the girls, wondering just how much of a big deal Kay and Serena truly were if this many things were after them. Sure, he remembered John's brief explanation about Kay the night before but this seemed extensive, even for them. 

He smirked when she asked him if John even slept and shook his head, "it seems not. Unless you count being knocked out by the wind spirit as sleeping. I'm pretty sure he'll keep going ubtil he just collapses from sleep deprivation if I'm not around" he replied to her, always relishing in opportunities to tease the crap out of John, whether he's next to him or not. "Kay is up by the way, in the kitchen having some breakfast. So yeah, John can fill you both in after you've both eaten properly" he then added.