Haiji Mibu is a bouncer, and it shows. He's crazy powerful and surprisingly quick, and has some good combos. I play a little bit of everyone, but Haiji is my main.
Movelist
Left-Handed Baby 236+p
Haiji leaps forward and delivers a punch to the gut. The button pressed determines the distance. Used in most combos without meter, and you can follow up with an OTG 3+HK. If you get your opponent in the corner, doing this over and over can piss your opponent off, because it briefly guard crushes when it connects.
Massacre Trumpet 214+p
Haiji twists back (can charge the twist) and flies forward with a deadly punch. Haiji has near-unlimited super armor when he's twisted back,so you can use this to eat up projectiles and counter, and it can make a good anti-air in a pinch. Horribly unsafe on block. Charging LP all the way doesn't do much, but a fully charged HP is unblockable and does 80% damage (don't expect to hit anyone with it though). This is also why Haiji vs. Haiji matches are fun as hell to watch: some crazy things can happen with this move.
White Sigh 623+P
Haiji's anti-air. Great damage, but kinda slow and can get killed if the jump in is deep enough. Remember, though: if you trade this with almost anything, the damage will be greatly in your favour. The move has a really screwy hitbox, I've seen players get hit from behind with it.
Iron Moon 236+K
Haiji leaps forward with a kick. Much better range than LHB, and safe if you hit from far enough. Makes a decent poke, but not too many other uses.
Match-ups
Yurian KILLS Haiji. Her throws are crazy quick and crazy long-ranged, I've been thrown in the middle of guard strings. Do not let her overwhelm you. All her moves require charges, so try to get her to move or block high.