Shows like suisei no gargantia

Gargantia on the Verdurous Planet (Japanese: 翠星のガルガンティア, Hepburn: Suisei no Gargantia) is a Japanese anime television series produced by Production I.G and directed by Kazuya Murata, and aired between April and June 2013. A manga adaptation began serialization in Kadokawa Shoten's Newtype Ace magazine in January 2013.

In the distant future, humankind has taken to the stars and formed the Galactic Alliance of Humankind (人類銀河同盟, Jinrui Ginga Dōmei). The Galactic Alliance is engaged in a perpetual war with a squid-like alien species known as the Hideauze (ヒディアーズ, Hidiāzu). Sixteen-year-old Ensign Ledo is a soldier in the Galactic Alliance, piloting a Machine Caliber (マシンキャリバー, Mashin Kyaribā), an artificial intelligence-automated, humanoid-shaped mecha, which he refers to as "Chamber". After a failed attempt by the Galactic Alliance to destroy an enemy super-weapon, Ledo is knocked into a wormhole and loses consciousness.