Kai had a bad feeling about this guy and realised the look in his eye while trying to persuade us... "Who eats at this time.. Let's go to my dorm, like forest said.. I'll walk behind you guys" emphasizing the MY to show that he was gonna watch him .. he looked at Ryan.. he wasn't gonna allow something to happen, plus, something had ticked inside Kai after that thing chase him.. he had some weird confidence, Forest hadn't seen or noticed his new hair color.. (Look in the Signature the brown parts where caused by his mark that spread and shriveled back)
Something was trying to take Kai over. what the hell was it.. It.. anything now would let it through.. he just had to keep calm and not show anything..