"Is everything all right?" Satoshi blurted out of the blue. "What happened? I thought I lost of all of you."
Somehow, Shiroi was a bit weirded out that Satoshi suddenly started talking to Dex even though this wasn't the first time she'd seen such an exchange. She decided to listen in on their conversation since she was also curious as to what transpired a few moments ago. Of course, she also saw the brief appearance of all of Satoshi's familiars when the explosion occurred. She was even surprised that Satoshi actually had a lot of familiars, more familiars than she had expected. There's a definite difference between Satoshi summoning his familiars one by one and them appearing all at once.
[Everything's all right, Satoshi, you don't have to worry about them. They've entered a state of hibernation after you've used up most of your uncontrollable energy and directed it at them, forcing them to grow more powerful.]