Board Thread:General Discussion/@comment-26006155-20181229180615/@comment-26006155-20190101015915

I have to wonder though, why would the monsters even think that it would take a human soul and a monster soul to pass the barrier in the first place?

How would they even test such a thing, unless a human in the Underground once tried to leave?

Chara was living with the Dreemurs for a while, and they had easy access to the Barrier. While Chara wasn't big on returning to the village, I'd be very surprised if she didn't at least try poking the Barrier at some point, and found she couldn't go through it.

She was sick for a while, something the monsters were unable to cure. And she asked to go home. Asgore and Toriel would have tried to push her through the Barrier at this point, I think, to save her life. But it didn't work.