Undertale spoilers (and Charles Williams's _Descent into Hell_)
@kara_dreamer@witches.town Basically doing more than one genocide run has Chara refer to themselves as "The demon that comes when people call its name." No matter where or when, Chara will kill the enemy and become strong. They then list the stats off like normal, then say they don't understand the player's SOUL's "Twisted feelings"; why they destroyed everything, then went back and did it again.