Never played this game competitively, but I did remember having a lot of fun with friends. Based on what I recall...
Mitsurugi - 2K,B great. cH WrB combos into CE. Good at Punishing and Good juggles.
Hwang - Mitsurugi but better at RO.
Han Myong - Hwang with more stuns and crazy stuff off cH...
I remember hearing something about the female custom characters with Wave Sword having some cheap glitchy combos, due to the hitbox difference caused by their size, but I don't know specifically what they are. Strife/Iron Sword was extremely good; IIRC a Strife player was top placer at a major...