So he wouldn't use it as an excuse to leave, Raine walked over, grabbed Kratos' tray, and put it in front of him before sitting down.

To get the conversation started, she said, "Normally, yes, there is an external device--they have to be mounted on Key Crests or the mana goes out of control, which makes the person wearing it mutate into an uncontrolled monster. Fortunately, it doesn't happen right away, and the Key Crest can be added on after the crystal is attached."