I totally agree with the above. Thank you guys for mentioning chess pieces, as I think illustrating them this way could give us some interesting theory crafting.
As I see it right now, the chessboard is filling with tons of pieces in motion- to that point
Fabian- a bishop piece for VG via Calisto and perhaps unseen members of the clan to influence. Also his perceived close ties to the royalty of the Princep's court makes me know that Fabian is a powerful piece, and one which can be used to pinch and force some action.
Sharon- As of right now, she is more than a pawn, less than a bishop. I am going to go with pawn still though, as her role is a means to an end; the empowerment of the VG's primary growth piece, the MC.
Calisto-Queen of course, but a Queen that follow's her lord and master's bidding without even knowing it sometimes...:VG
VG- She is the King of this chess board of the city we are in.
Princep- a semi unknown, but putting in as a bishop at this point, ability to make game changing pinning choices.
Markus-with his knowledge, personal prowess, the ability to be a wrecking ball, he is a rook. He will likely have a huge part in the coming game being played for the political arena that Artemis aka Vision Girl is playing.
Marcius-glorified pawn.
Kassandra...... as yet to be determined. Going the theory that she is a mover and shaker in the city entertainment industry, she is definitely a piece with potential, so a pawn for now.
Eloise- for some reason, I think she, and the old Guard she represents will be potent, powerful and like Markus a wrecking ball. I think she is a rook waiting to make her play.
Astrid- she is a pawn of the other team, though if she is as powerful as I think she could be, and was attempting a gambit, that failed, she might be a bishop as well.
MC- he is a knight in the making. Able to force the game. Able to checkmate in the proper circumstances. I think he is definitely the new martial piece that the red Queen and King are pushing in this game. (Red, White, Black, whatever colors we use are unimportant, but it is vampire so Red

)
Feral Nos- sadly for her, she was a pawn used to draw out other pieces. She succeeded in her sacrificial role.
Virgil- Another knight. Self Assured. Obviously old (Plubius) and powerful. He is definitely a martial piece that for the moment is looking innocuous.
I enjoyed that. Only Astrid strikes me as definitely the other team. There are more to be revealed for sure....I am excited.
Peace