She was basically their prototype Akuma/Kizumi.
She's Lili's family's vampire prisoner IRC.
Also she's comedically narcoleptic, which I love.
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FYI: She was the winner of an official poll in which players got to vote on a new character. She like most of the entrants didn't have anything solid yet and was mostly a concept to be built off of. She was special however, in that she actually was worked on a few times going back to even before T6, but things got in the way so she was just shelved. The other enterants were:
(My favorite) a zombie bride, supposedly Miguel's sister:
A sexy Tekken Force agent:
This guy who I don't know anything about:
A guy from that 3D movie, a giant preying Mantis, a giant Salmon, a female sumo wrestler that idolizes Ganryu, some kind of girl version of Paul,
a regular old man with no gimmicks.
There was also a buff ass Pac-Man that they decided not to put into the poll at the last minute. I'm almost certain he would have fucking won:
The idea of playing as a beef'd up Pac-Man and doing brutal, devastating, bonecrushing attacks and combos while he still has that stupid face... that's a real dream right there.