In the first episode of Volume 2, the Gran Knights get a semi-break as they track a Zeravire presence to an island amusement park. Since they're there, they might as well enjoy themselves as they look around. But after this enjoyable and light-hearted episode, things get a bit more dramatic, or in my opinion, a bit sillier and more boring. Straight up out of the blue, Mizuki reveals herself to be a spy for the EFA and was only around to steal Gravion technology for use in constructing its own fleet of powerful mecha. We also learn who Sandman really is and where he came from in a confusing and rambling fashion that leaves you just as much in the dark as before. As the volume progresses, even more Gravion pilots are lost, leaving the team crippled and unable to defend Earth against the Zeravire menace!
Volume 2 of Gravion Zwei tried in vain to walk a line between melodrama and stupidity and fell into an abyss that it might never crawl out of. Most of the characters display emotions and actions that are completely out of character, such as Sandman crying like a pitiful baby, or Mizuki betraying her comrades, or Ena suddenly becoming a superbrave heroine. It just didn't add up. Add to this the totally uncomprehensible tale of Sandman's past and an EFA mecha that uses a giant soccer ball to attack the Zeravire and this 2nd dvd is a complete disaster. I much preferred the first series when nothing was explained at all about anyone or anything. In giving the show a little background, and it adding new characters, they have exploited almost every anime cliche.