Haku is the father of Shuten. When Shuten came of age he believed he should be the head of their Clan. After he finished a powerful sword made from a piece of the Soul Edge, he confronted Haku and slew him. Or so he thought. Haku survived the attack and went in hiding. In a strange way he was proud of his son, as none of his many offspring could accomplish nearly as much as Shuten had done. So he watched Shuten from afar, but maintained his belief that he was dead. He even traveled to Ostrheinsburg to observe Shuten obtain Soul Edge itself. He arrived in time only to witness Shuten slain by a human known as the Dark Emperor. Whether Haku has plans of retribution towards Kristof is not yet known.