Wow...where can I start with this ova which is basically 56 min long. If I compare this with it's sequel Kite, it's very different except they have the same style of main character which is both assign to kill people. Other than that, it's a very different OVA.
This kinda feel weird as the story is all over the place. The main plot you start with is this space food and radiation mutates astronauts plot but it also have the sub- plot from the 1st movie which is basically killing people who rape young girl. The story is mix match so many thing in here that you feel like the director don't know if they want to make a sci-fi show or a crime drama with over the top fighting scene and a mix of emotional show. I guess if they try to follow the 1st OVA, this sequel might be okay but what I see, it's feel very odd and rush.
For character development, they isn't really much to say on both main and the supporting side. Very bland to say the least. They did try to develop a bit of the main character you're following but most of it just the simple and typical stuff like a flash back of the main character past with her father for example. Unfortunately, with the limited development, you don't feel too attach to them and it doesn't really help when they try to push the emotional scene with the main character and her father which is now become a monster.
The only thing good from this OVA is the action element in the fighting scene. With what they show, they did it well and it's nice to the fight scene happened as you watch.
Overall, this OVA is kinda in a weird place. It's weird story with sci-fi mix is very odd as the original sequel is more in dark and tragic in the story line. The only good thing from the show is the fighting scene which is still good to watch and entertained. Unless, you're fans or if you just want to watch an animated that have cool fight scene, I won't recommend this show at all. For people who want to see Yasuomi Umezu work, then stick with Mezzo or Kite as this is one of his better work from what I see. Just don't watch the sequel for both of them as they're not as good as you hope for.