So it seems she got called "Hatsune", hence the Miku. They better not make the tagging situation more complicated, Mortis was bad enough...
I really hope that it's not a secret sibling thing. I'd understand if it was Uika being a woman who erased her name, but Uika having a secret twin would officially make me question what Bang Dream is even about.
I think I got all of what's left. I'm fairly certain that's Winback to the right of Worms (specifically Worms Armageddon, which was the only Worms game on the system)