|Appears in||Light Novels, Manga, Anime|
Ka Da was Ka Shin's ancestor and a legendary doctor.
Ka Da once met the Yellow Immortal and asked him a question regarding saving a human life. In order to answer her question, he decided to become a doctor and eventually invented the process of human surgery.
Ka Da wrote many books about medicine and diseases which were passed down through her family for generations and were very valuable to most doctors who thought of them as jewels. During her life, she had fallen in love with the Yellow Immortal but never told him about it.