The fourth season of Senki Zesshou Symphogear. 
 
Hibiki Tachibana has defeated many powerful enemies, saved countless innocent lives, and escaped from numerous desperate situations, but she is currently finding herself unable to escape from her most desperate situation yet—summer homework! Although her high school life is relatively unremarkable, her career as a member of the military organization S.O.N.G. is anything but. Using powerful, ancient armor known as Symphogear, Hibiki and her teammates work with the United Nations to deal with international disputes and disasters. 
 
During a mission briefing at headquarters, Hibiki is made aware of a mysterious organization known as the Bavarian Illuminati, who has been responsible for several major disasters in the past and currently operate in the war-torn country Val Verde. Together, Hibiki and her team infiltrate one of the Bavarian Illuminati's manufacturing plants and free hundreds of slaves. Exposed, alchemists Saint-Germain, Cagliostro, and Prelati reveal themselves as the organization's top brass, and—using alchemical powers—declare a global revolution while sacrificing thousands of lives. Faced with yet another threat to the world's survival, Hibiki and her allies must confront the Bavarian Illuminati in their most difficult and destructive battle yet. 
 
(Source: MAL Rewrite)

Episode 1 - Awakening Heartbeat

Episode 2 - Noise and Disharmony

Episode 3 - Passing in the Night

Episode 4 - Falling Tears

Episode 5 - From the Bottom of Darker

Episode 6 - Where Omens Lead

Episode 7 - Fate Just Keeps Firing

Episode 8 - No Shadows in the Sunlight

Episode 9 - Protector's Song

Episode 10 - What Only Clasped Hands Can Create

Episode 11 - Shoot the Moon

Episode 12 - Symphogear

Episode 13 - Meteoroids Falling, Burning, Disappearing, and Then...

Satelight

Symphogear AXZ