Complex sentence: Kenichi reunites with Shunsaku, only to be cornered by Rock, who manages to dispatch both Shunsaku and Kenichi, and reveals to Tima that she is a robot.
Split into simpler sentences: Kenichi reunites with Shunsaku, only to be cornered by Rock. He manages to dispatch both Shunsaku and Kenichi, and reveals to Tima that she is a robot.