Hey that's nice.
>>537598987
I haven't done the story, but I know that Rubia is some sort of spy maid, check Beauty Impossible pack in character packs, she briefly appears there. Dunno about Sylvia, based on her animation, yeah she is a cop.
>restaurant
yeah, it's kind of a bridge between realms made by a demon to suck on people's energy, that way you can interact with any universe.