Jayden is another version of Frisk and Chara. She originally started off as one that would only kill the smaller things, because to her, they didn't matter. Besides, how could a small monster like Vulkin make a difference alive or dead? She killed the smaller monsters because she simply didn't care. When Pike began to become nicer, Jayden became jealous. Jealous that Pike was better friends with everyone instead of her. Jayden couldn't accept that she was jealous, so instead, she told herself that she had to become the old Pike, or else something bad would happen. She's long forgotten about her jealousy, and know kills for the fun of it. The people who can react in the way of their feelings, they are dangerous, and must be terminated. Those who don't have the strength to stand with their feelings can be ignored and forgotten. This is what she lives by now.