nobody even plays them at tournaments let alone win it, I have only ever seen 2 tournaments with Ein in them. and the players either switched or got knocked out early 
Free Step Dodge
UpSideDownGRUNT
VAND1TA
Or Pai, I really wanna see someone win a tournament with a Virtua Fighter character. :3
Chapstick
I don't think I've ever seen a Kasumi win a tournament either. :/
ninjaguy446
Only Ein rep I've seen is Lightsonic. Bboy uses Kasumi and XCalibur Bladez uses Eliot sometimes.
Heikou
Master winning DiD with Hayabusa is probably the closest you'll get.