Kongou no Ani

A highly advanced machine with artificial intelligence that was created by Dr. Ayumu. They are considered Kongou's older brother, and both machines see Ayumu as their mother.

Once discarded by humans for purposely miscalculating a meteorite and letting it hit Earth, they now take the shape of ice floes. They stole Phos's arms at the Lunarians' behest. They harbor a deep resentment towards humanity (other than Ayumu), but are otherwise carefree and easygoing. They love sushi cream chips.

According to their own story, the reason they let the meteorite hit Earth was to get revenge on Ayumu's supervisor, who was taking credit for all her work, including the creation of Kongou's older brother; so they called the supervisor to the place where the meteorite would hit. Dr. Ayumu seemingly understood and forgave them, and before they could be destroyed, she switched them out with a decoy and sent them into the ocean to escape.