Between Two Worlds

Three of the main characters of a steam punk vampire role play I take part in together with my fiancé.

Stanton White, Sarah McLoid and Kriztophyr Draganovic.
Turned vampire, human, pure vampire.

The story takes part in Londonshire, a large city which is build from many levels, preventing sunlight to reach down into the lower levels. Because there is hardly any sunlight or daylight, vampires rule in the shadows, commanded by the Council.
Sarah is send to this city to collect evidence of that vampires excist, but fails horribly as she quickly comes to the conclusion that the vampires in Londonshire are more tougher than the ones she had slain before.

She meets the vampires Kriztophyr and Stanton, both like day and night from each other.
Kriztophyr is a very wild and impatient vampire, not to mention rough, while Stanton is calm, kind and a true gentleman. She has a hard time to figure out who exactly she can trust, but she gets a liking in them both...
Who will she choose to palce her trust in?