Several centuries ago, Katja kidnapped Hansel and his sister Gretel. A fairy tale was made off of the story where they killed Katja and escaped, but in truth, Katja befriended Hansel and he began working with her. When Gretel tried to escape, Katja killed her and had Hansel eat her heart. Having become evil himself by that point, Hansel gladly did so and continued to work with Katja for centuries to kidnap children so she could eat them.
By 2015, kidnapping children had become harder due to Amber Alerts and other methods of searching for kidnapped children, so Katja resorted to having Hansel use the Transfiguration Spell to transform adults who wouldn't be missed into children so she could eat them instead. When Rowena started stirring things up, the Grand Coven sent Katja to stop her. Arriving in Pendelton, Oregon, Katja got a house and continued her work, with Hansel kidnapping J.P., Tina and Dean Winchester. However, Dean was a hunter and escaped as she ate J.P. and returned with his brother Sam. The Winchesters tried to kill Katja with Bobby Singer's Witch Killing Spell, however, Hansel turned on them and Katja smashed the spell. While she was distracted explaining what the Grand Coven had wanted her to do, Sam attacked her while Dean fought Hansel. Both were overpowered, but Dean managed to reverse the spell on himself and reverted to his normal age, killed Hansel and shoved Katja into her own oven with Hansel's hex bag in her mouth, incinerating her.
Powers and Abilities
Katja was a powerful witch.
- Witchcraft: Being a witch, Katja is very experienced in the use of spells and hex bags.
- Telekinesis: Katja also showed signs of telekinesis when she pulled Sam Winchester against a cupboard without touching him. She also smashed Dean's Witch Killing Spell potion with a wave of her hand.
- Immortality: Katja can live for a very long time if not infinitely as Hansel revealed that she can not be killed by an ordinary human and has been around an unknown number of centuries, long enough to have become a legend.
- Power Granting: Katja was able to grant her loyal servant Hansel immortality despite him being a regular human.
- Witch Killing Spell: As a witch, Katja could be killed by the Witch Killing Spell.
- Fire: Dean Winchester killed Katja by burning her to death in her own oven.