Board Thread:General Discussion/@comment-26173722-20180625135942/@comment-33883848-20190911160502

@YellowBunny.

There's also another logical explanation as to why Charasriel soul did not persist:boss monsters souls persist because they have strong monster souls but Undyne's soul is even stronger as she melt when she dies whike boss monsters dont however her soul does not persist just like boss monsters souls.So the Occam razor suggest that when one has too much dt,it soul melts along the body and eventually turn into dust.Charasriel soul was a combination of a strong boss monster soul and a strong human soul but yet it did not persist(as otherwise there's no way for Asriel's essence to be separated from his soul)and thus likely melt along the body before turning into dust.