So I looked it up and a) a litchi is a small rounded fruit with a central stone and rough skin, so that's something new I learned today and b) I actually use professor Litchi a decent amount as well. Her fighting style is pretty unique and I got a handle on the stick mechanic more quickly than I expected. But yes, she is very boobs.
As for DoA: Volleyball, that was pretty much what I saw the Game Grumps do: fail to impress girls in the game with expensive gifts. I think you might get a chuckle or two out of that series given you've experienced that frustration firsthand, but then again I don't know if Game Grumps' colorful language would really be your thing. Also, I prefer them to most let's players because they're usually talking naturally, but that series probably has a lot of screaming delivery in it which I don't like ... Well, just throwing it out there.
Tina and Helena I have no clue about because I just don't play DoA. Seriously, this demo might be the only thing in the series I played aside from an arcade cabinet I don't recall the name of.