I use wine haku, the red and white one. Red stand for Bravery and Courage, thing need for an aggressive haku. White stands for faith and clarity, faith in your skills and clarity to perceive peoples attacks, IB, and counter accordingly... and i just like red XD
236A but since he has a small hit box you have to time it extremely precise, also you have to be close to Carl, so the 2A hop set up work well.
but it's bet to not do anything and go for the IAD for a meaty JC, it's haku's most active attack and can be air to ground comboed with 3C 2B or 2A. close enough to the ground and you can combo 5C for the 623AA combo.