Eliza was a hidden character in the Free To Play Tekken Revolution. Log in enough and you could earn enough "bloodpoints" to unlock her.
I never managed it since I didn't play ever day of my life.
She is a Narcoleptic Vampire/Fanservice character (man, what the @#$% is Harada smoking over there?).
She was supposed have been buried under Lili's mansion when demolition freed her.
She isn't even as bizarre as the flying robot Wifu Alisa.
Or the midget T-Rex.