Q·Ko-chan: The Earth Invader Girl



It is a manga created exclusively by Hajime Ueda.

Synopsis
In a universe where the Earth is attacked by aliens, a 13-year-old boy named Kirio is living in a fictional district of Japan, where the elite and the children of the military reside.

One day, an unidentified flying object arrives at that place, which is battling a land defense ship. After the fight, that UFO arrives at the house of Kirio, shrinking until taking the form of a human girl of 13 years.

She introduces herself as Q·Ko and wants Kirio to be her pilot. From that moment, Kirio and Q · Ko form a team that will face the alien threat: Q·Ko is transformed into mecha and Kirio handles it.

Subsequently more mechas appeared with their respective pilots.

Trivia

 * The idea that a group of "chosen" children save the world is a well-known cliché and overexploited in the series of animé aimed at minors (notable examples: Digimon, Shaman King). This was apparently criticized by the same Hajime Ueda, showing in one scene that a chosen child dies in an explosion and another (friend of Kirio) is injured by a bullet in the leg.
 * Ironically, the manga story continues to use this overexploited plot.