Superb Song of the Valkyries: Symphogear

During a Zwei Wing concert, the idol duo is attacked by mysterious aliens called the Noise. Tsubasa Kazanari and Kanade Amou fight back using their Symphogear armor, but in the chaos, a bystander named Hibiki Tachibana is mortally wounded. Overcome with grief, Kanade sacrifices herself to save Hibiki-an act that leaves Tsubasa devastated. Two years pass. Hibiki survives, while Tsubasa continues battling the Noise alone. As the alien threat grows stronger, Hibiki faces the Noise once more. This time, however, she discovers she can wield Kanade’s Symphogear, giving her a chance to fight alongside Tsubasa.