Ka is a Kharidian cat who featured in the 2015 Hallowe'en event. She could be spoken to to find out further information about the event. As a reward, she was also available in pet form as a Kharidian cat. A Catspeak amulet is not required to talk to her. After the event, she can be found at the Soul Altar in Menaphos, given the player has found all Cats of Menaphos from the Menaphos journal.
- Ka was removed with the 2015 Hallowe'en event on 10 November 2015 and was re-added with the update on 3 July 2017