The feeling was akin to having a loved one pass on.
This was not to belittle the emotions of grief, and the two are not the same, but the sense of loss - to a certain extent, was.
It was more than just a loss of one of your senses, like sight, for it touched Kay at the deepest level of her soul.
When Sayuri called her to tell her what had happened, Kay felt fear. Sayuri was crying, but she still managed to tell Kay properly, "Kyle was fighting Donnie. I … I don't know what happened. I just found him in a pool of blood."
Hearing Kay gasp, Sayuri quickly assured her, "It wasn't his blood."
Kay was relieved, "What happened to him?"
"Doctors are stumped. He's physically injured but none of his injuries would explain his coma. Kay … I … I …"
