 Symphogear

Two idols, Tsubasa Kazanari and Kanade Amō, collectively known as Zwei Wing, battle against an alien race known as Noise using armor known as Symphogear, which uses the power of music to counteract the Noise's destructive capability.However, Kanade sacrifices herself to protect a girl named Hibiki Tachibana, who ends up with a piece of Kanade's Symphogear relic, Gungnir, embedded in her chest.