“Gattai Girls” is a series of posts dedicated to looking at giant robot anime featuring prominent female characters due to their relative rarity within that genre.
Here, “prominent” is primarily defined by two traits. First, the female character has to be either a main character (as opposed to a sidekick or support character), or she has to be in a role which distinguishes her. Second, the female character has to actually pilot a giant robot, preferrably the main giant robot of the series she’s in.
For example, Aim for the Top! would qualify because of Noriko (main character, pilots the most important mecha of her show), while Vision of Escaflowne would not, because Hitomi does not engage in any combat despite being a main character, nor would Full Metal Panic! because the most prominent robot pilot, Melissa Mao, is not prominent enough.