While the young Angelique lives out her days peacefully in her school, attacks from the monstrous Thanatos has been increasing everywhere else. Two Purifiers show up one day, men with the power to exterminate the Thanatos. One of them, Nyx, attempts to convince Angelique to join them in their work, as she has the power to be the only female Purifier. As Angelique hesitates, a Thanatos shows up in their school. Nyx and the other Purifier, Rayne, fight a losing battle. With her classmates falling prey to the Thanatos, and the Purifiers beaten to submission, Angelique's desire to save everyone awakens. She became the only female Purifier in their land of Arcadia, the one known as the "Queen's Egg".

Unaired episode included in the eighth Blu-ray and DVD volume. Ema visits Tina's house after a long time. While singing and spinning yarn, Tina and the children spend a peaceful time together. They reminiscence about Tina's foster mother, Natoria, who had the power to spin the yarn which once carried magic power. And now to the spinning wheel she used and left behind approaches an ominous shadow... (Source: Official Twitter)

As the relationship between Mahoro, Suguru and his classmates develops further, another android girl enters their lives and becomes attached to Mahoro. All the while, the number of days before Mahoro is to shut down decreases steadily. (Source: ANN)

A 2-episode OVA for Suisei no Gargantia revealed during an announcement at AnimeJapan 2014.