Eventually, after seeing both the Nerox and the housekeeper either interact with or comment on the cat's existence, Kyo finally decided that perhaps it wasn't another image he had created. Although it was embarrassing to think that he had been assuming that he wasn't real the whole time when he actually was, he made a mental note to go introduce himself properly later. As he probably would have to for the other two new arrivals in the room. 

...whenever the one on the floor was conscious. 

Honestly, the number of people who dropped to the floor without warning here was starting to noticeably worry him. He rose from his chair when he saw the boy fall, but wasn't sure if it was alright to approach. The housekeeper seemed to want Mike to heal him, so perhaps it was best for him not to crowd them.