Galilei Donna

Mouretsu Pirates and Galilei Donna takes the science fiction theme and transforms it into an idea revolving around girls in a futuristic setting. In that setting, there is a world with advanced technology but at the same time poses threats for humanity. There is a sense of mystery going on behind the origins of the main characters and why they get caught up into events that puts their lives in danger. At the same time, the main characters from both series revolves around character relationships mixed with drama, emotions, and humor. Action is also present with a taste of sci-fi/spacecraft warfare. 

The protagonist is a 13 years old girl of notable ancestry who has a relic from her ancestor which hold a great power and many enemies chase the protagonist for it. Despite being in different time setting, both have a genius inventor and a funny group of enemies. 

Both anime`s features technology but the difference is Galilei Donna is more Mysterious while Vividred Operation is more on technology. 

The story follows 3 main heroins in a advance sci-fi adventure where they go to a place to meet a certain goal. However, an obstacle is in there way when some government or military are going to capture them. The characters are often seen through dramatic events when looking on their perspective view. Galilei Donna follows the Ferrari sisters, who are given chase by the government. They go off in an adventure to search some secrets that they never heard of. Coppelion follows three high school girls in a post apocalyptic setting of Tokyo where their task is too find many people as they can and bring them to a different place. read more 

"Galilei Donna" and "Rolling☆Girls" both have a cast of all female protagonists, each with their own unique personalities. The lead characters go on an adventure across lands where they have never been to before, often facing obstacles along their way but making new friends as well. 

Similar Slice-of-Life/War story with a girl who suddenly becomes OP towards the end of the show.  

Suisei no Gargantia and Galilei Donna are both science fiction theme series that takes place in a futuristic setting. On one faithful day, the main protagonist's life changes forever after a certain event. As fate calls for it, the main characters must get acquainted with each other in order to survive. There's also a certain group from both series that are mysterious with origins to be explored. And speaking of exploration, character relationships goes down that path as we embark on a journey of discovery. There's also a sense of mystery regarding the backgrounds of the main characters as well. Combining that with action and comedy along with humorous dialogues brings forth a scientific adventure. read more 

Both have a strong emphasis on family heritage and adventure where the characters meet enemies and allies along the way and often have to use their wit to get out of situations. Both also start in Europe.  

In both you have kids (or at least young adults) who embark on a journey to find something that doesn't have to fall in the wrong hands. The kids/young adults are chased by a shady organization and a bunch of carefree sky pirates, and are descendants of important people. 

Rinne no Lagrange and Galilei Donna are science fiction theme series with a trio of girls as the main characters. Together they take on challenges ahead of them. One of these challenges includes the invasion of a mysterious force that threatens their very existence. There bits of mystery involved around the series as to who these invaders are and their origins. Both series contains action, comedy, and also some fan service.  

A mix of historical themes with modern issues. The Daughter of 20 Faces is set solely in the recent past, while Galilei Donna is more sci-fi fantasy, seemingly set in the present or near future, with many references to the distant past. Both are good stories mainly about risky adventure, and searching for a series of important items, all the while in constant dangers of being shot at by being everyone's enemies.  

In both anime the main characters are descendants of a famous historical figure. There is a lot of action because the main characters are sought after because of their heritage. Also, both anime have a delicious loli.