My Diabolik Lovers OC

Hi everyone I just made up an oc for the anime Diabolik Lovers and I could use some help drawing her since I'm not a very good artist but I do have her appearance in my head. I haven't decided on a name yet for her yet, but I do have some background and a backstory for this character.

Background:
My OC is a trained and professional vampire hunter who has a strong hatred in vampires for killing her family when she was a child and is determined to eradicate all vampires off the face of the planet so that nobody else may suffer the same fate. She cares for Yui Komori as if Yui was her little sister and promises to always keep her safe.

Appearance.
For my OC's appearance, I sort of imagined her as kind of a more grown up version of Yui (Like if she was in her early or mid twenties) except with longer hair. She carries a kitanna (made with the same metal as Subaru's dagger) which she uses to slay vampires.

So I would really appreciate it if anybody would share their drawings of this character and I will decide which one I think is closest to how I pictured my OC.