Kismet, originally known as Ahti, is a powerful cosmic being which helps other lifeforms, such as Superman, by illuminating different possible paths for them, and sometimes shows them the outcomes of those paths. She does not judge.
Her enemy is Dominus, who was once her lover in a different lifetime. He was obsessed with finding her and killing her.
She also bonded for a time with Superman's childhood friend, Sharon, to become Strange Visitor. During this time, she wore Superman's electrical containment suit and gained his powers.