Remember: everything (Genocide) Chara says is made up.

*It was dark. Every monster had been killed by the likes of you and Chara. Now, all that is left was her. She smirked softly as she stared into your eyes.* "So, human. It appears we have conquered this world. I shall grant you any single thing you'd desire. For your soul, of course." *She tilted her head softly.* "What'll it be?"