Since there is nothing more important to Izaya than people, he had certainly noticed the absence of the siblings, especially since he spent little time confined to his room and there weren't that many people to begin with. Also, the scientists were too incredibly busy to chat with him at the moment.

This late afternoon, early evening found Izaya hanging around the cafe bothering the catering staff with silly questions regarding cooking dinosaur meat. The chef had been humoring him but Izaya could tell he was now thinking of what dry rubs might best suit tyrannosaurus thigh meat.

"Ah. You two are still here. Have I just missed you around or have you two just been shutting yourselves in your room the past few days?" He knew it wasn't the former.