Hello Raine.
2D illustrator and character artist here. Portfolio: artstation.com/bjornvillain
Vampire apocalypse dark fantasy is close to what I already draw, gothic and horror leaning, villain designs. I would put myself forward for characters, concept art for props is fine too. Environments are my weaker side.
One honest note: my style is not straight anime. Darker and more painterly than that. Worth checking the portfolio before anything else, since that will tell you faster than I can.
I know this thread has a lot of replies at this point, so I also sent you a friend request on Discord in case that is easier to catch. Eruyuen there, in case you would rather reach me first.
If the roles are filled, no worries, good luck with the game either way.