This Comic's Cast:

The Grand Hallway has actually appeared, in some form or another, in just about every Castlevania game, with few exceptions. Most of the times it hasn't appeared, the games took place outside of the ground of Dracula's castle (and thus, they wouldn't have had the same Grand Hallway anyway).
The Grand Hallway is specifically denoted by a long hallway (of course) with red carpeting and a few staircases leading up to higher platforms (most of the time, these staircases actually appear in the exact same spots, and their layout as been fixed, for the most part, for years). The hallway will lead to a lower area, one filled with water and Mermen. Then another staircase leads back up, another short hallway, and a boss fight at the end.
It's a lovely constant and adds a certain retro charm to the place.
 
    

When evil spreads across the land, and darkness rises and the monsters roam. When the creatures of the night make beautiful music, and the things that go bump in the night go bump with greater enthusiasm. When the world is in peril and is in need of a hero...

These guys are, sadly, the best the world can hope for. These are the adventures of the heroes of CVRPG. They mean well, they try hard, and occasionally they do the impossible...

They actually do something heroic.