Yes, I'm afraid so. We could hardly have mysterious floating objects without those.

[That's how zoologically dubious creatures roll. Speaking of which, no, she's not particularly alarmed by the whole laser light show he's got going on. So long as he keeps the beams pointed away from her eyes, we're all good. Besides, if she wants to know, she'll figure it out eventually.]

They leave some of the glowiness behind as a gift. Magnanimous little things. As far as I can tell, the glow just... glows. Try not to get bit anywhere you'd miss.