Why did Angel Gazardiel kill Lucifer's daughter Sarine?

Angel Gazardiel killed Lucifer's daughter Sarine as part of a larger conflict between celestial beings, driven by a desire to eliminate threats to divine order. Sarine, embodying both light and darkness, posed a unique challenge to the established balance. Gazardiel's actions were motivated by a belief that her existence endangered the stability of both heaven and hell. Ultimately, this act reflects the deep-seated tensions and rivalries within the celestial hierarchy.