The characters are pretty much average and nothing much to shout about. We have the typical tsunderekko, ignorant wimp, womanizer, bishounen shoujo (think Chie), kawaii loli and the dojikko all rolled together under the large cast of Unit 5121. Pretty much most of the stereotypical anime characters are here. Individually forgettable, but the interaction between them is what makes them stand out. As for the enemies, they aren’t given much things to do, except just to stand around to get hit by the protagonist’s.
As for plot direction and story, it’s probably the best thing of the show, as it flows fluidly and manages to give most of the characters some form of development. The slice-of-life approach taken here by the show is probably not for those who are hardcore fans of mecha shows like Gundam and EVA. It’s best to describe GPM as the ARIA of mecha animes. Still the story is perfectly developed and ended in the 12 short episodes it runs for as there’s no feeling of “being rushed” and “deus ex machina’s” being employed.
On the music part of the show, I didn’t really find the OP and ED interesting to listen to, which is quite a shame as it could’ve given GPM one more plus point for me. But the BGM is fine and funny to listen to with some overdramatic music being used at times, to a funny effect, which I think is probably intended by the production crew.
All in all, GPM is quite a nice show to watch, if you have nothing much more particularly interesting to watch/do. It’s 12-episode format makes it quite bearable to watch, when you consider the main point of the show is to watch the hero hook up with the heroine. Take a look at the top 10 anime characters post for more anime reviews.