This contains spoilers for Undertale and all of my AUs so

So I realized that all of them have died from sharp objects.

And then there's the child to the very left who died of eating flowers.

By the way, here's "what happens when you eat buttercups" according to Wikipedia:

"Poisoning can occur where buttercups are abundant in overgrazed fields where little other edible plant growth is left, and the animals eat them out of desperation. Symptoms include bloody diarrhea, excessive salivation, colic, and severe blistering of the mouth, mucous membranes and gastrointestinal tract."