Chas remained back for backup just incase either the mage or the demon would attack and get ahold of Serena. He knew that if Serena got hit by a demon's claw it would be bad news for her, that very few people ever survived a slash from a demon and the last thing they needed right now was both girls in trouble. 

The mage and demon looked around following the silver eyes that circled them both whilst listening to the voice of Serena. The mage didn't scare easily but he was unnerved by what was happening. The demon wasn't scared at all, having seen a lot worse than this. "Child's play!" The demon exclaimed, "if you're not a coward you'd show yourself!" he demanded. Hearing this demand, CHas hoped Serena wouldn't fall for the bait, "dont do it Serena" he whispered. 

Kay heard the lock being messed with and she thought the worse, instantly stepping back out of self defence but when the shadows lightened enough for her to see it was infact John breaking her out, she never felt so thankful to see a friendly face. "John" she said greatfully, running into his arms and gripping onto him. "you came for me" she said almost surprised.