Phantom thieves? That's up my alley....I mean.... Van's alley.
Who can that masked vampire be?

(If I wasn't a ninja I probably would have joined.)
Edit:
Van the masked vampire (a.k.a the thief of hearts)
After making a spur of the moment purchase on an exact replica of a final fantasy airship, he was suddenly in need of quick money.
He now kidnaps the daughters of the rich and holds them for ransom. He always treats the girls he kidnaps with courtesy and gives them a fun time, so when it's time for them to go back they almost never want to leave his side, earning him the nickname "the thief of hearts."