The end episode leaves it open for future series but they are not necessary.
The characters all have specific roles and this therefore makes the anime interesting and fun to watch.
Along with this we see the presence of technology and magic co-existing side by side in endless developments which causes a relation to be formed in the watcher between the anime's story and real life, it also causes you to think, "Maybe all this will be possible one day?" and gives the initiative of showing that it could be done with the materials we have in use in this day and age used in a different way.
If we think of the anime as a new life story we can estimate into the future, and if there is another series, we can see without reading the original work that all the characters will have more future roles to play.
My personal opinion, not based on the original work as i have never read it, is that i would like to see more development and battles with opposing forces (people not just beasts). But this time with there own technology that isn't stolen or now in use by Ernesti's group.
Back to the Anime that has been created. I believe that the story could have been improved to show more of events and therefore possibly doubled or more the amount of episodes in the series. This would have kept people hooked and the enjoyment would have stayed around for longer.
Anyway thats all i have to say for now, I hope no-one has any problems with my review.
