While the gist of their relationship remains sort of there during the whole series, everything else dies after episode 2. The monsters become a joke and just a background threat with no mention of the anomaly they were in episodes 1. The death-level danger gets replaced with cartoon-like violence. As for the mysteries of the world, the series sidelines that by instead focusing on the human cities, while new mysteries are thrown-in later on, they are also vaguely hinted minutes after making mention of them.
There is some character development, but it doesn't really feel organic as it feels rushed. There is some big reveals in the final episode, but we also don't get any conclusion to any of that, and by that time we get a second season, I'm sure almost nobody won't care enough.
Overall, the series is kinda enjoyable as an adventure of the week episode, but there is much better series out there than this one.
