There's a team from the ARKS Special Planetary Search Unit, known as Alter. They were forced to make an emergency landing on Planet Machia, when their ship, the "Delta Valiant" came under attack. Since planet Machia has the peculiar quality of negating the use of "photons," the team will be forced to find a way to survive.
Considering how photons are non-existent, this game will introduce a new energy known as "Gran" (Grand). This energy can be seen gushing out in various places from the planet.
Phantasy Star Nova will also release with a brand new class! Busters (Bu) are an all-rounded class, which according to Shougai PSO, can equip weapons in all categories—including "Piles". This class also has the ability to use skills from other classes.
A new weapon category will be introduced called "Halos." Halos are weapons that equip to the wrist of your right hand, but instead of photons, they fire Gran energy particles. In addition, they can produce "scaffolding fields" that lets players ascend higher to attack the Gigantes.

Yuno is a mysterious girl who teaches information about Planet Machia. She makes appearances as a hologram.

Raven, the Deputy Director of the Delta Valiant, displays talents in the field of Research and Development. He's also in charge of equipment repairs at the ship.

Garation is 40.77 meters long, 44.75 meters high, with blades that resemble a chainsaw.
Mahouka Koukou no Rettousei crossover?
Busters…? A class that can use all weapons and PAs? Sounds nice, though that seems typically lazy of Sega. ^^; Unless there's major drawbacks to the class, Nova's going to be nothing but Buster Masterrace / Ethan repcas.
Halos on the other hand… now that sounds interesting. If that picture is indicative of what the weapon fires, then it's like a longer range Ra Grants or something I guess?
Well, if you've played PSP2 or PSP2i, there is a class called Vanguard, which is able to be "a jack of all trades" class. That's not strange, specially if they add another jack of all trades class.
However, if they do that, IMP, they would add that class for people who prefers using all attack types, just for more variety.
Greetings.
Another explain all hologram (maybe also an AI, maybe it even fall in love with MC in sequels).
"equip weapons in all categories" doesn't necessarily mean "can equip each and every weapon type in the game".
More likely, its weapon selection has one or two from each attack stat, like Sword and Pile for strike, Rifle and (maybe) Halo for ranged, and Rod and (maybe) Halo for Tech.