You're Chara

After a long few weeks of depression you'd been hiding from your family, you decided to flee. Where did you go? To the big, purple door in the middle of the Snowdin Forest which leads to Old Home. Though you couldn't go inside. You brought a vine-cutting knife, intending on some... bad things. But, as you're about to do it, you hear a knock on the big door, and a voice rings through.

"Hello? Is somebody there?"