Judging only by his playstyle, I'd say the likelyhook it's Sharon is even smaller, seeing as Sharon plays very defensively and the Baiken in these videos is very aggresive most of the time. Not worth arguing about, but I am curious as to whom it may be.
I have never seen sharon use j.HS that aggressively/dangerously so consistently
And the more I watch, he really does play sloppily, not sharon-like at all.
Also 2D on wakeup? -_-
Back to the thread topic, you can combo tetsuzansen with normal jump j.S j.D for the knockdown.