An Alien Dream.

Earth is now a barren wasteland, destroyed by the monstrous species with no name. Supposedly one lone human girl survived the invasion due to her (now deceased) parent's ties with the extraterrestrial. Now she must live on a distant planet and train in the ways of a guardian. But because of her frail body, her adoptive parents built her a suit made out of a special aloe that enhances her abilities.
Now 18, she is one of the strongest out of her fleet and an official guardian. She even found love with the unique princess of the planet Dandorova. Her name. Nara.
But nothing could prepare her for what came next.