Yakunan came before the Oni could corrupt him and the FSM (Hikari). Yakunan raised Xenudah with Hikari together (non-romantically for clarification) then the Oni came. Yakunan fought the oni with the FSM but Yakunan (who dubbed himself the Overlord) and Xenudah got corrupted as a result. Yakunan raised his son Xenudah until he was 10 years old. Both before Yakunan’s corruption, and during it, he became emotionally distant from Xenudah, pressuring him to achieve extremely high standards, which Xenudah was heavily uncomfortable with. He hid Xenudah within a cave, then battled Hikari for control over Ninjago. As it turned out, Hikari was playing the Akurai family the whole time, believing all those who were associated with darkness and shadow were evil by default. In a last-ditch effort to defeat the First Spinjitzu Master, Yakunan merged with his element of darkness, losing his humanity partly, nearly forgetting about his son. When the land split, Yakunan realized his son was trapped within that cave and could do nothing to bring him back. In his despair and devastation, he descended further into madness, vowing to take control of Ninjago to reunite with his child once again. When Xenudah realized his father was no longer in his presence, he began to resent him while also desperately longing for him to come back. When Xenudah was alone, Shiren had a one-night stand with him. In her guilt, she fled, taking Kymika with her upon her birth. However, she felt she could no longer raise Kymika, fearing that her daughter's lineage would ruin her life and how people would perceive her, and she gave her up for adoption at a very young age. She became known as a vigilante fighter called the Crimson Shinobi since then. Having lost all three of his family members, Xenudah descended further into madness until he reached his breaking point: upon his freedom from his prison, his ongoing resentment evolved into fury, vengeance, and hatred towards Lloyd, who he had presumed to have killed his father as the Ultimate Spinjitzu Master (which was not the case as Lloyd purified him, much like he had with Garmadon). All members of the family desperately sought to reunite with each other once again.
