She is the leader of the deliverers working at the entrance to the Underworld, but her behaviors make her unworthy of her title.
Her main duty is to command her underlings to deliver wandering souls to the next life.
If there are any defiled spirits nearby, she will use her giant scythe to destroy them without mercy.

Though wearing a serious look on her face, she is a careless girl, not active in her work at all.
She often gets distracted and slacks off. Fortunately, her companions can always complete the work dutifully.
Goorveig, in particular, does not like her lazy attitude and often criticizes her. However, Kyphon does not mind it at all.

A deliverer's duty is to guide ghosts to the next life, and prevent them from hurting the living.
Her former companion Goorveig violated the duty and reaped the souls of the living. In order to hunt her down, Kyphon stepped into the Chrono Tower.

She is often reported by fellow deliverers for being lazy. But Acheronte, ruler of the Underworld doesn't punish her for that, and Kyphon herself is not willing to make any change.
Sometimes, she can be found lying by the River of the Underworld and resting like there's no one around.
Goorveig once made a detector that could wake up Kyphon as soon as it found her sleeping. But after Goorveig left there, Kyphon is back to lazy mode again.
"Oh? A new soul? Ah, never mind. I'll leave it to the others."