Hello again, doods and doodettes!
The last time I posted content here on DA was a picture of me holding HDN:V on the PS3. I started playing it the same day as well.
To those who are familiar with the series and have read about this game already, you would know that this takes place in an alternate universe known as the "Ultradimension Gamindustri G.C. 1989. I won't say how, but the main character Neptune ends up in this dimension with alternate versions of Noire, Blanc and Vert. Although they act pretty much the same, the difference between the worlds are shown throughout the game.

To let you know now, I'm still in the first play through of the game and I'm in route to the good/true ending. So the theories I have about the are just opinions of my own, nothing too concrete. When I finish the game, I'll have more info and theories.
Also, THERE WILL BE MINOR SPOILERS!

1. Noire(Victory)

Because the first scene in the AU involves her and Plutia(which I will go into detail about later), she seems to take the spotlight in majority of the game. As I previously said, she acts almost the same, however, this Noire is  considerably more softer in her "Tsundere" personality as she actually has a friend in Plutia. But Noire still has trouble admitting to that. She also is a great landing pillow, apparently, as Neptune lands directly on her after being transported to that world. She doesn't learn her lesson either as she becomes a crash pillow to two more people. So I think she's lost some of her sharp insight that the original Noire has, since she happens to be the only one not to more when something is falling the crews way. Be it a person, CPU, hell a meteor would be falling, and she'd stand there until it's too late!

2. Plutia

Plutia is the CPU for Planeptune in the AU, and she's exactly how she looks. A lazy, bed headed individual who sounds like she was on the yellow bus before becoming a CPU. Seriously. The voice will piss you off after a while. Granted, you will get used to it as the story progresses and the other characters make their appearances, but god forbid, if there wasn't a skip feature I'd put it on mute with the quickness. I think she might even be the AU version of Neptune herself...Oh, and she's a sadist. Yes, a sadist. Plutia must have been holding a lot of anger inside, because when she becomes Iris Heart, nobody it safe. Nobody! Histoire, Blanc, Arfoire...anyone who is in her sight will become her new whipping toy, her punching bag, her outlet for her anger. And her voice, dear gawd the voice....And hide the children, 'cause Iris Heart even traumatized IF. Apparently it still effects her to this day...I think she's an open lesbian. I'm just sayin'...

3. CPU Memory</i>

In this world, Goddesses are not born. They are made. Girls who want to become CPU's must find an item known as a CPU Memory, which houses the power for the wielder to become the CPU's that we all know about. This causes problems for Neptune and others in the first few chapters of the story. You see, Neptune loses her ability to become a CPU due to these rules and in turn loses her goddess powers. Obvious solution is Nep, Plutia and Noire(who also isn't yet a CPU) go to find one. One problem: If the CPU Memory finds you unworthy, you'll be turned into a horrible monster. Isn't that grand?
Here's a WTF for you: Plutia never intended to be a CPU! She was out having a picnic by a river bank, when a CPU Memory was washed ashore. What did she do? She thought it was friggin' candy and just popped it into her mouth! A true facepalm moment...

4. Blanc(Victory)

Of all the AU characters, I think Blanc/White Heart has the most changes in her personality. First off, Blanc wears what looks like a miko outfit. She also seems to be more open as opposed to her original counterpart. However, that doesn't mean her rage has subsided any! If anything it may have gotten even worse. When you play through the story and have to confront her in Lowee, she has a more self centered attitude about her. It makes sense because before Planeptune and Lastation, there was Lowee. And for a long time she had runed her nation a the sole CPU in Gamindustri. So when when Lastation arises with Noire, and Planeptune ends up with two CPU's you could understand why she was angry. But beneath all of that anger and stress of ruling a nation, Blanc is just a shy, sensitive girl.

5.Nepgear

*sigh* I feel sorry for cute little Nepgear. She took the leading role in HDN:mk2, helped lead everyone to defeat Arfoire and save Gamindustri. Hell, she even is at level 10 at the start of the game while Neptune is at 1! Unfortunately, she doesn't have such a large role in this game. She seems to have lost her intelligent edge when she get so excited to see her big sister after her disappearance, she distracts Histoire's concentration in getting Neptune back and Nepgear gets pulled in instead...landing on Noire. From that point on, she is treated as useless by not only the other cast, but by Nep herself and even the game, which gives her absolutely useless affinities such as, "Jealousy", "Emo" and "Turncoat" which do nothing for the game. However, on a better side of the coin, her love of robots and mechs had helped Neptune, but only if you get the event. I just hope that things will become better for our former lead protagonist.

I'll have more after I finish a few more hours of gameplay.
Thanks for reading!!