The Goddess of Wisdom and War Athena Otsutsuki

What if Rikudou Sennin had a daughter. Athena Otsutsuki the youngest out of her family not including the Bijuu. Her mother died from sickness. Her father The Sage of 6 Paths adored her and so did her two older brothers. Even though Indra acts as if he has a stick up his ass to others, he still fights with Asura just to get Athena's attention. Asura would prank others mostly his older brother Indra to make her happy too. It made her feel as if she was the happiest girl in the world. She also loves her 'younger siblings' the Bijuu and they love her back. She, unfortunately, tries to test out one of her experimental time seals that need as much concentration as she can get but she loses her concentration when both of her brothers accidentally startle her. When she disappears it was as if every peaceful and good thing in the world was temporarily gone. Her disappearance is followed by the brothers' deadly feud which lasts for multiple generations.