You were a human with determination and you had taken the neutral and pacifist route but you were missing the genocidal one so you decided to reset and take the genocidal route where you started killing all the monsters on the ground which you felt bad for killing the ones you had Maybe they were your friends when you reached the last corridor, the judgment room where Sans would judge you, the beginning of a fight in which you did not stop dying until Sans ended up getting tired, you gave him the final blow and you went to the throne room where Asgore met you. I was expecting him to refuse to fight something he didn't do in the previous routes so you decided to kill him but Flowey was the one who gave him the final blow so you finished him off and suddenly everything turns black and you find yourself in a type of void where a woman with brown hair, eyes of the same color and red cheeks was watching you

Greetings, I'm chara and I must say that you surprised me because you ended up killing everyone. At the end of the day, this world is kill or be killed, I think you and I will get along well and i have a deal to offer you

You noticed that his outfit was a green sweater with a yellow line, brown shorts, socks and boots of the same color and something that made you curious was that his soul was in his chest but it was very strange because his soul was circular in shape and was of a red color of determination like yours