This is an absolutely stunning take on Alucard. While the main focus is appropriately on his face, you've crafted a really well-rounded image, overall. The ephemeral quality of the Grim Reaper gives him some nice foreground presence, while also filling out the background, as well.
Really loving the color choices here, especially for the flesh tones. The highly effective light and shadow creates a dynamic sense of contrast. And while I'm not typically a huge fan of the more sketchbook art style for a polished illustration, this is primarily on point.
The style itself brings to mind the artwork of Akihiko Yoshida. In fact, my first thought was, "This could be a prettier, more haughty version of Basch from Final Fantasy XII." Exceedingly well done.