Board Thread:General Discussion/@comment-27174095-20160117010358/@comment-27669265-20160129025155

You should first do neutral. Then pacifist, then genocide. If you do pacifist again, at the very very end, something will change. (Spoilers) scroll down if u wanna hear.

So, chara is the first human who fell down. She died, so Asriel fused with charas soul. She took her up to the surface and layed her down on a bed of flowers. Now, if you do genocide then pacifist, after the pacifist route, you will be in a bed on the surface living with Toriel. Your character will remember the genocide route, and he will start losing color. He then turns around to look at you, which shows he has now became chara, and is now able to erase the whole surface, just like he was able to erase the whole underground. Just answering with a little extra!