If you're looking for manga similar to Mobile Suit Gundam 00 (Light Novel), you might like these titles.
The story takes place in the future when humanity's new paradise, the cyber universe "DEVA's" mainframe is hacked by a mysterious hacker from Earth. DEVA's high officials dispatched Angela Balzac, a DEVA system security officer, down to the Earth's surface to investigate the situations srrounding this mysterious hacker. What are the hacker's motives? Angela descends on to the devestated surface riding her exoskeletal powered suit Arhan.
In the future, Earth is split into three factions: Dorssia, an empire bent on world domination; ARSUS, a military alliance; and Jiro, a collection of neutral states with colonies across the galaxy. On one such colony, Haruto Tokishima lives a carefree life at Sakimori High, where his greatest concern is mustering the courage to confess to his childhood friend, Shouko. His idyllic life is broken, however, when a team of Dorssian super-soldiers, led by the enigmatic L-elf, assaults the colony to retrieve the 'Valvrave', a mobile suit secretly being constructed there. In the resulting chaos, Haruto watches as Shouko disappears within a laser’s blast; enraged, he climbs into the now accessible Valvrave, and defeats the Dorssian army after forsaking his humanity to the machine. Haruto pledges to protect the colony, but can he come to terms with what he's given up to gain such power?
The year is 2345 Correct Century, and in the aftermath of humanity forgetting about their advanced technology, Earth has regressed to simpler times. The Moonrace, an advanced colony of people on the moon, has sent the three teenagers Loran Cehack, Keith Laijie, and Fran Doll to Earth to see if it is suitable to live on once again. Two years have passed, and the Moonrace has arrived on Earth to settle in the Sunbelt zone with the help of the Dianna Counter forces; however, the people of Earth are angry and respond aggressively to their invaders. With negotiations for peace failing, will the people from Earth and the Moonrace ever learn to coexist? Or is this the dawn of a new war?