Complex sentence: Akane and Kogami stop Makishima's forces while Enforcer Shūsei Kagari follows one of Makishima's allies to the tower where Bureau Chief Joshu Kasei kills Makishima's ally and Kagari to keep the true form of Sibyl a secret.
Split into simpler sentences: Akane and Kogami manage to stop Makishima's forces while Enforcer Shūsei Kagari follows one of Makishima's allies to the tower. There, Bureau Chief Joshu Kasei kills Makishima's ally as well as Kagari to keep the true form of Sibyl a secret.