The first episode of the anime series 'Symphogear' aired on Japanese television, marking the debut of the franchise.
The second season of 'Symphogear,' titled 'Symphogear G,' premiered, continuing the story and expanding the fan base.
The third season of the Symphogear series, 'Symphogear GX,' aired, further developing the storyline and characters.
The fourth season, 'Symphogear AXZ,' premiered, bringing new challenges and story arcs to the series.
The fifth season, 'Symphogear XV,' premiered, continuing the saga of the Valkyries with new music and battles.
The mysterious Noise creatures first appear and attack Earth, initiating the conflict that leads to the development of Symphogear technology.
Relics related to the Valkyries' powers are uncovered, leading to the creation and use of Symphogear armors.
Kanade Amou destroys the Noise threat by using her Symphogear but dies in the process, inspiring future generation of warriors.
Hibiki Tachibana becomes the user of Gungnir Symphogear after Kanade's sacrifice, marking the beginning of the new generation of Valkyries.
Hibiki and her allies engage in their first battle against the Noise and the antagonistic forces.
Kirika, a key antagonist and scientist, introduces her plans to manipulate the Noise and Symphogear users.
The team discovers the ability to use resonance to boost their powers and overcome stronger Noise threats.
The Valkyries confront the ultimate Noise threat in a decisive battle to protect humanity.
