I'll resume:

All characters and weapons farmeable trough dungeons

No stamina system at all

Dungeons can be wiped with friends or alone, while alone, we'll have an Al to assist us in combat Music is mostly focused Opera themed

Combat will be personalizable with short and long range options for each character

New characters will come every 28 days with their signature weapon

New characters have a farm cap, but they come with time limited grind missions that grants more character shards

Once a character isnt new anymore, they can be infinitely farmed

They'll be some daily 7 days login rewards Cosmetics can be purchased or obtained trough a gacha system, currency can be bought and obtained trough events too

The story will be following the two protagonists, switching between them Pre-registration rewards for everyone, character Berenica included and an exclusive accesory Berenica, Rebecca, Outsider, Daphne, Margie, Truffle and Filbert, and Lisbell, will be granted trough story, no need to grind for them