Kat (Devil May Cry)

Kat is a supporting character in the DmC reboot and serves as Dante's guide for much of the game. She is able to see into Limbo as well as project her astral form into that side-dimension, and is also familiar with several Wiccan spells.

In DmC
Kat is a pyschic girl who was orphan for unknown reasons and was rasied by a demonic step father who "attacks" her every night.

She went into limbo to escape and until she met vergil who came to her call for help.He convinced Kat to help him rid of the demons and later killed her foster father.