[Killua's petting manages to get her to sheathe her claws again, not even realizing they were out. Surprised, she looks at her hands, the proof of their existence all but erased.

Alluka's ears perk up at the words "40 years ago" and she looks at Bisky strangely, blinking her eyes in disbelief.]

....Huh?? What do you mean? I thought you were our age..?