Here's an idea I got,
You all know Chara, right? You probably do and IF I SEE ONE FUCKING PERSON BLAME THEM FOR THE GENOCIDE RUNS I WILL KILL ANYONE AND EVERYONE YOU'VE EVER LOVED. Oops, I may have gotten a bit brutal there (Probably should save that for my journal book, check it out if you want).
So, what if before Chara was adopted by the Dreamurrs, they were Chara AFTON. IMAGINE THE POSSIBILITIES!
So, Chris and Elizabeth die and Michael is depressed and Chara thinks he hates them(Chara). So, Chara jumps into the underground to commit suicide.