Just as he had appeared, and swooped Christine up, Thobias disappeared in a flash once he was sure Christine was on their side of the conflict. The stage was set, the players were all in piece, and though he did not organize the pieces, he would deal with them using all his knowledge and the best of his abilities. And the best of it he gave, because he knew what was at stake. He had to make sure everything went according to plan, his plan, and whether or not that fucked over everyone else didn't bother him the slightest.
He silently detested himself for still caring so much for Katherine even after they had broken up such a long time ago, and he wished he didn't have to deal with this childish squabble. He watched from atop the rooftop of a nearby building that he teleported to as the fight commenced between Katherine and Rurik. It was a fight where he was as unbiased as anyone can be, though he felt that Rurik deserved to loose for trying to "settle a score" while Kath was injured. Still, he saw something in the boy. He would make a great addition to his team...once this is all over. For now, he just watched the rage of the Demoness.
Or was it Kath? She couldn't tell... it seemed like the eloquent taunts of the Demoness were mixed with the burning passion of Katherine and it ended up coming out as a speech that hit the intended target. And even more. For a second, he almost felt bad for Rurik. Almost, but he never really felt sorry for anyone, so this still meant something. He had been blinded by his relation to Kath for longer than he could say, and though he did try to get the two to ease up, he now had a new outlook. The same richness and pompous attitude he despised so much of his own family was shining through Katherine. Admittedly she would've never said it in such a way without the demonic influence, but the core of it was still the Kath he knew.
Whether it was this, pity, or just the general failure to connect with the Demoness's words, Thobias slowly shifted to cheering for Rurik in his head. Well, somewhat more that it. He still had one goal in mind to save Kath, but he had already figured out that the boy was stalling for time. Not that they would've needed that while he was here...but Rurik didn't know that, and he wasn't going away until he saw this fight resolved.
He took his phone out and quickly dialed Sarah. Much like Liam, she responded almost instantly. "Sarah, things are getting heated up. They are fighting and I don't want to risk interfering now. Get ready just in case I need to disperse the crowd." With that he ended the call and anxiously followed the events.