So this is their backstory and such!

When the human child fell down they were hurt badly. As they cried and whimpered in pain they heard a voice calling out their name. When seeing it was a young goat child monster they blinked. They were in need of help. And so around 2 years later the human child, named Chara was adopted into the Dreemurr family with Asriel who found them. But one day, they fell ill.

When they died they wished to be buried near where they first fell which was where a patch of butterscotch flowers laid. Chara had also wished to go to the surface to see the flowers in their home village once again.

When Asriel absorbed Chara's soul, he managed to break the barrier for a short amount of time as he carried Chara'a body to the area where Chara said they wanted to see the flowers. As Asriel approached, one of the human villagers thought Asriel killed the poor child as they attacked Asriel out of fear.

With Chara's soul, within Asriel, they told Asriel to kill the villagers, to protect himself (This is where it isn't to the actual backstory, before it is.)When he refused, Chara took control and managed to kill all the villagers as they knew they had control. But once Asriel gotten control he went back into the underground and killed himself.

Chara awoke in a dark place. The void was the place they awoke at. Blackness surrounded everything as they knew that humans will fall and die. But when Chara managed to get out of the void, the eight-well seventh not including theirselves, Frisk had fallen down. Now Chara is able to do things that Frisk doesn't even know about. After all, they are just a glitch. A glitch that never should had happened.

You can draw Chara in this AU~ use your imagination.