I'd give an overall synopsis of the story, but everything in this show is so loosely connected to each other, there really isn't an overall plot besides the main focus of the budding romance between the two main characters, Precia and Hyaweh. There seems to be some evil organization out there that wants power to become like a God and most probably, rule the galaxy or something of the sort. But because all of the episodes focus mainly on the romance between the two characters instead of the plot mentioned briefly, it doesn't amount to much, besides in the last episode, really.
I feel the saving grace of this show has to be the art and animation. The overall design on the anime and characters is something new and will shine to you once you start watching. Heavy detail is given to each of the characters and they are all colored well. Speaking of which, the use of color is really portrayed nicely in this anime. Animation is also pretty good, as many of the battle scene, even though rather quick, are nicely animated. And just to throw it out there and something of totally my opinion, I absolutely loved the weapon design that this show presented.
Overall sound was pretty good. Music was upbeat and fit nicely with all of the scenes. Some of the character voices I did not particularly like (i.e. Precia, one of them), but its doesn't take away too much from the show.
Like I've mentioned above, the character design is amazing and the detail given to each is strikingly clear as you compare characters to one another. Prism Ark, being an ero-game, more detail is obviously given to the women characters than the males. As far as personality and such, you have your typical main protagonists, each with their own twist (stuck up, stubborn princess and a shy, courageous lad, both of whom just so happen to have dark secrets). What brings the show out of the dirt is the side characters, all of whom compliment the main ones quite nicely and have different personalities, leading to personal favorites.
Though Prism Ark has some interesting battles and the anime revolves around students in a knight academy, training to become Royal Guards, a huge factor of how much you may enjoy this show can be based on the fact how much you can put up with the romance factor. It also gets a bit frustrating too as the romance between Hyaweh and Precia, although so painfully obvious, doesn't really develop till the second half of the anime.
In the end, I feel that if they stretched this out to be a 24 or 26 episode series, the potentially interesting plot that was introduced but not really brought out till the last few episodes, could have been developed much more. Ultimately, I feel that the anime is more of a fan-service to the audience who have played and are familiar with the Prism Ark games.
