Easily the freshiest and most interesting fighting style in a 2D game for a long time. He takes a beating, deals out big damage given the chance, can be played brain-dead or you can really thrown in the tactics.
All his normals are really good. s.B can be spammed Rolento/Big like. Rolls of course hurt this tactic, but you would be suprised the number of hits you will get as the other player tries to get out. Close and far look identical, but close can be cancelled to special/super.
c.B is also a really good kick. If there was a special to use after the c.B, c.A you would really be laughing. c.B, c.A, c.C comes so close to linking. c.D is solid as well. Dodge, b+k on block. Or dodge, u+K/d+K if it is blocked deep.
j.D is all around good air-to-air and air-to-ground. Far D and c.C are both really good AA.
Both close heavys chain to the command attacks. f+C is the overhead chain starter. Has range but I'm not really sold on it. At range the followups of the chain will miss a lot. f+D doesn't have that problem though.
d,d+P is the fall to ground, u will uppercut. You can really get away without this unless a jump-in is really telegraphed.
Jump-in D, close D, f+D, f, b, uf does crazy damage.
The dodge(qcb+e), throw (hcf+e) could almost be considered broken considering the damage it does when low on life.
Dodge, dash (f+anything), something else has pretty strict timing. Chain with dash in middle will not combo. The dodge is pretty easy to grab and the amount of actual dodge frames is pretty small. It is best to go right into an attack after it.
Rush super is a pain to time. What exactly does the power up super power up??
Multiple df+D knees look possible after LDM in corner. Otherwise lots of df+D, dp+A is cool.
No multiple knees in the corner. It does do chip damage at least. After f+D appears to be the best time to LDM, you'd be crazy to pick Gai as your leader though.
c.C is scary in it's range and speed, you'd think it was an Iori move.
Gai is really quick shift friendly, both in and out. Shame you can't QS during his chain dash. There would be some good throw games there.
Watch how you do moves out of the dodge, for example if you dodged then did hcf+e,e you would get the CD attack.
Speaking of the CD. The ground based is like Terrys, except it seems better slightly better on all fronts.