In 3.1.
If I had to guess I'd put each character in these groups. Based on what we know from DOA2 and 3 versions.
Top: Hayate, Jann, Hayabusa, Bass, Ein, Genfu
Mid: Tina, Christie, Ayane, Kasumi, Leon, Bayman, Leifang, Zack
Bottom: Helena, Brad Wong
You forgot Hitomi.