Complex sentence: Not only Zero gained Ryoko's powers, but also Ryoko's feelings towards Tenchi, she defies Dr. Clay's orders when he ordered her to kill Tenchi when he feared that he was a liability in her mission.
Split into simpler sentences: Not only Zero gained Ryoko's powers, but also Ryoko's feelings towards Tenchi. She defies Dr. Clay's orders when he ordered her to kill Tenchi when he feared that he was a liability in her mission.