Katrien was a woman who knew the Warlock before he fell asleep. After escaping from a rogue warlock's lair, the Warlock came upon the town that her family, the Janssens, lived in. They were descended from pirates, and while they were ashamed to admit it, Katrien embraced it, mastering the art of fencing. This attracted the Warlock to her.
One night, Katrien discovered the Warlock's dark tome that he stole from the rogue warlock. She visits the chapel, presumably to divulge his dark arts to the clergy. The Warlock, knowing this could be the end of him, devises a spell to make Katrien forget about his craft. When she doesn't wake up, he realizes he has failed, and inadvertlently murderd his beloved. He decides to escape the waking world and gives himself up to his nightmares, creating the Abyss and resurrecting Katrien along with it.
Although she is long dead, the memory of her remains with the Warlock, and just like the creatures in the Abyss, she has been summoned into reality. Katrien now fights to save Chile from the nightmares, and to stop the Warlock.