Cyber Planet 1999: Hyper Rune (1996)

Blurb:
Rune is an 8th grader with some unique problems. It’s hard to live a normal life when her "mad" scientist grandfather keeps making her dress up in wacky costumes and calling her the "space queen." When mysterious humanoid robots start appearing, an alien plot to conquer Earth is revealed. However, things aren’t so simple as there seem to be two groups of aliens, each with entirely separate goals ... Rune and her friends, a set of twins she’s known since childhood, are able to transform into robot forms that are similar to those of the aliens. These forms give them great strength and allow them to fight against the interlopers. Rune befriends one of the seemingly good aliens who now has taken a human form and is attending Rune’s Junior High school. Meanwhile, the evil aliens are making preparations to revive their leader in order to complete their plans of conquering Earth ...

Source: www.anisearch.com/manga/4380

Rune Ayanokouji lebt ein ganz normales Leben mit ihrem Großvater, welcher ein verrückter Wissenschaftler ist. Als mysteriöse humanoide Roboter in der ganzen Stadt auftauchen, deckt sie eine außerirdische Verschwörung auf, die versucht die ganze Erde zu unterwerfen. Rune tut sich mit ihren Freunden zusammen, um die Invasion zu bekämpfen... aber wenn das Schicksal der Welt auf dem Spiel steht, wem kann man dann vertrauen?

Quelle: www.anisearch.de/manga/4380