The very mention of Jayce makes Kell light up visibly. He wouldn't have asked. Jayce is probably pretty tired after the rescue effort, or busy, or both. Kell doesn't want to drag him here just to keep him company, if that meant he's going to be loosing sleep or time... It would have been selfish to ask... but then he is selfish, and that's not news to anyone.

"Can you ask Jayce" he still needs to take a break, but this time he's determined to finish the thought. "to come?"

There were four people he wanted to see right after he woke up. Jayce was in the top two. For no particular reason other than that he missed him. The knowledge that Jayce and Viktor are free, and actively working to find and free them, was one of the few things that kept him going in captivity. That helped him not to succumb to despair, into thinking that he's not going to survive this, that they all are going to die.