My perspective of the whole coop thing.
I believe it is a great system, considering this is actually a first for me. A online multiplayer H-game. Like literally, I never played a coop or competitive H-game before and this might be a first for me. Surely, communication is incredibly important in a multiplayer game, but there are games where it can visually show the status of your teammate and their signals, messages, and emotes. So whether or not this game will have such communication system, they might still be able to give some visual communication for those who cannot afford having even the worst working microphone. And finally, for those wonder who are the playable characters are, long time Melody Blood followers will know that there are 3 playable main characters, and 2 outside of the main Melody Blood game itself.
Now my other perspective of the whole coop thing.
I might get a lot of negative feedback that this game might not have a coop. Looking at the images, it looks like the characters are all mirrored. Knowing musfan since his rehab, he has 2 test models when he started developing this. So if he were to make a coop, he'd be using 2 different models instead of the same one. But I hear you saying "but he mirrored the model and animation just to save some time". And you're probably right about that. but the fact that both players are right next to each other so close that their models would clip to one another is not a coincidence.
But I'll let the mirrored model and animation slide for the mean time. Considering that it is good save of time and effort as a developer myself. But another thing that stands out to me is why would it be so close to each other. When testing a multiplayer game, you can make 2 separate controls for each player even using the same keyboard as the first player, or have it running on a external input like a game pad or something. And what's about the two players doing the same action simultaneously like some sort of mirror.
My guess is that he is making a ghost trail effect. Which is the process of making after images each particular frames of animation that model is creating. Similar to the original 2D Melody Blood where Natane dashes forward or where Arianrod sprints. Navis the prologue boss can do the same ghost trail effect when closing in on the player, so that might be where its at. Another speculation that I am thinking of is a skill. The skill in particular that I am talking about is "Doppelganger". If Melody Blood as he described it is inspired from DMC, then a Doppelganger skill is plain obvious outcome. Considering it is the same model doing the same action as the player simultaneously, ignoring the fact that the model is mirrored. But that might actually be the reason why it is mirrored. Probably because he wanted it to be a mirrored image of the player doing the exact same movement as what the character is doing, similar to the DMC3 cutscene where Dante acquired Doppelganger for the first time. To top it all off, it might be given to Nina, considering she in the whole Melody Blood playable roster is the only one with no particular abilities that is unique like the other heroines. And because she is a vampire, such skill is a possibility(me taking my love for this game and vampires too far).
So that's my perspectives of the whole coop thing, I hope I didn't offend anyone, and hope that this could actually be any help to any of you.