Okay, I had to watch this twice to be able to get some sort of feedback that wasn't just "HOLY CRAP THIS IS AMAZING!"
Don't get me wrong, it was amazing, there are just a few things that I noticed my second time around that I feel needs to be addressed. Before that though I will give you my praise. First of all, the new music was great. It had me on edge and it set the mood very well. The voice action was spot on and very convincing. Especially all that "Oomph" that Nega-Alpha was displaying. The fight scenes were very nice, especially the one that displayed "The Beast" that Alpha had turned into.. I liked that Kirb finally decided to put Flamey in her place, I was really tired of her back handed comments to him without any sort of retaliation. Kirb is a bit arrogant but I don't think he deserves the verbal abuse he gets from his comrades when they decide to gang up on him even if it's all in good fun. I could see why he would be annoyed by them at times since he's almost like the odd man out. Nylocke and GC have their thing, and of course Flamey is Alpha's fan girl, so I could see how that would be lonely. You should add a sixth member for him. :P
ANYWAYS, on with the constructive criticism. The on and off shading is starting to get to me. Like, it seems like you pick and choose which times you'll shade your characters, and I know you can do better than that. It's not just the times where the characters stand idle, it's also some scenes where you just didn't bother to shade. I don't understand the point to that. Then I felt that some of the expressions were off, like when Kirb was talking about how they haven't decided the pairs yet. The post was just weird. I think you should make up a few more poses to avoid that in the future. The next thing was that I didn't understand why Alpha all of a sudden didn't want to use that power.
It seemed really out of place from what we saw with the hackers. He didn't seem to feel guilty using it to get rid of them. Did we miss something? What made Alpha decide that what he was using was potentially dangerous? Why care about using it against that machine thing that was beating up his friends? It doesn't make any sense to me. And the other thing, what was that animal machine thing? I don't like that a random monster provoked Alpha into becoming Nega-Alpha. I really hope you explain this in the future.
The last thing was it seemed like Zeta's machine arm kept switching from left to right, but that could have just been me.
Even with all of that criticism I still give you 4.5 stars, because I love Tome and I'm a big fan of you, Kirb! Please keep up the good work! I can't wait for episode 6!