This is developing nicely. It's great how the foreground characters pop nicely from the background with the value contrast you've used. Raguel's head is getting a bit lost, though: You might consider making it lighter - it is white bone, after all! - but it's surrounded by that dark cape so some additional value contrast should make that a nice center of focus.
Also, a very minor point, but proper English would be "The Groom Who Dances," not "Dance." It's not about the art so I hope you don't mind my pointing that out.
Good luck finishing it!
Any of those titles would work, in that they're grammatically correct. 'Hell's Dancer' feels a bit generic, and 'Sword Dancer' fools a bit redundant (ie we can see in the picture that'she's dancing and has a sword, so the title doesn't add anything.) I like 'Grim Dancer', but I also still like 'The Groom Who Dances,' as it explains the relationship between the main character and his dancing partner. But whatever you choose, you'll be judged on your art, not your title!
Keep it coming!