"Wow," Chara says, "Your talent for specifics is astounding. Well then, as far as I can tell, 'a few people' are probably just a bunch of weirdos. Maybe they were just trying to play a weirdo trick on you, who knows?" They shrug in a rather theatrical manner.

...And then they fall silent, chewing on their lip and staring intently at some point over the other child's shoulder. After a bit their gaze drifts back to the other child's face.

"...Right, I still haven't told you why I killed so many people," they say. "I have to admit, it surprises me that you don't seem to have an idea. Didn't we kill anyone in your timeline? That was the whole point of resurrecting me in the first place."