A sigil appearing and disappearing isn't an unusual thing, so he pays it little mind when it doesn't attack him for being there. And were it any other situation, an alarum would be cause for concern if he wasn't already trying to see if the occupant of the room was there.

'Come in' says a familiar voice and he does, sliding the door back shut with his heel once his tail is clear of the threshold.

Elidibus is in bed and K'zeka assumes he'd just woken the man up. The second sheet draped over his torso is a little odd, but compared to anyone else the cat's ever met, fairly tame and not worth more than a mental note and raised eyebrow.

"Haven't seen you around the train in a few bells and went looking." And notably not apologizing for apparently waking Elidibus up.