Karl Zivonik was a Manticoran citizen and an inhabitant of Sphinx. His treecat name was "Shadowed Sunlight", later changed to "Shining Sunlight". He was one of Alexandr and Evelina Zivonik's seven children. (HHA2.1: TS) He had a close relationship with Sumiko Uchida, who was taken in by the Zivoniks after the death of her entire family from the Manticoran Plague. Tragically, she was killed when saving one of his sisters from a falling crown oak branch. (SK1, SK2)