Deadlock

She's never met Dracula in Deadlock.

She was betrothed to Aryn Fairfax (Pocket) and promised a life in the limelight. She was basically raised for this very purpose, so her parents could have their family joined with Fairfax (basically magic Rockefeller industrial-complex family of America).

When Aryn was asassinated (failed, Aryn actually just went into hiding taking on the name "Pocket" ) by order of their own father, the marriage obviusly fell through.

A spoiled brat, she made the lives of her parents a living hell for "failing" to provide for her, so in an attempt to sate her desire for glory, they promise her eternal youth and unlimited power

They arrange to have her become a vampire (something the rich in Deadlock can apparently "just do").

She's still not happy, though. As a vampire, she's basically the lowest of the low. In their social circles, she is less than a child. She was young as a human. As a vampire she's considered dirt.

Made absolutely livid by this chain of percieved injustice, Mina is participating in the ritual with the aim to become Viscount of New York, and rule vampire society as she sees fit.