Vis Dev for Games - Vampire Hunter Concept

I'm currently taking a class about visual development for video games.  It's a pretty nice class.  I get to learn a bit about conceptual art specifically for the game design process.  Right now I'm working more along the lines of character design.  I've been doing many preliminary drawings for a specific character of my own design with props and personality development.  This is the character concept so for.

 

 

This is just a rough value composition for a possible final illustration.  The basic premise of the character's background is she is originally a young innocent and nieve girl, whose love has gone missing in the Crusades and has been captured by dark creatures of the night.  She seeks help from the Church, though they are unwilling to help her with war being waged in the east.  A dark and mysterious priest though is willing to lend her a hand by giving her to power to go and find her love herself.  Without thinking, she accepts and receives a new and strange power.  Little does she know, in her is the power of darkness and slowly but surely it consumes her.  As she herself becomes captive of darkness, will she be able to save her love enslaved to a dark fate?  

I know men typically are the knight in shining armor, but I thought it would be pretty interesting to have a female lead.  A story of some white knight is just a children's tale, a black and white story.  But, a story of a soldier fighting for the church who has been taken captive being saved by his love who unknowingly has become possessed by evil to save him makes a much more interesting concept.  What will her love think of her now that she has sided with the Devil, while he has risked everything for God and the Church?  Will the means justify the end?  Sounds like a good drama, and perhaps somethings can be learned from the dilemma.