Check the tutorial below for an idea on how Hibiki functions. This was made in CF1 so it doesn't cover a few CF2 specifics, but it's an amazing introduction to the character.
Like many characters in Blazblue, Hibiki's blockstrings are very freeform and will change to suit your needs. These are some basic blockstrings that'll get you started and confirm into combos without too much trouble.
A common part of Hibiki blockstrings. 5BB > 6B is a builtin frame trap. 6BB > 6A is another frame trap, while 6BB > 5C is a true blockstring. Loses to Instant block DP and Overdrive.
This string is an example of gatling limits on Hibiki's normals. The 6D is a pressure reset. After 4BB, you can't gatling into 5BB because you've used it twice in the sequence, so you have to use another button like 2BB instead. This also means you can't combo into 6B if 4BB lands. This sequence gets blown up by mashing.
A quick example of microdashing in pressure as Hibiki. Hibiki's 5A is very useful as a stagger tool because it hits crouchers. Very useful for opponents using Barrier trying to keep you out. On instant barrier, you'll have to dash up farther. This will cause you to get hit by certain 2As, or your opponent will escape.
An example of the blockstrings you can get if your opponent doesn't actively use Barrier and Instant Barrier. If your opponent uses these tools properly, you'll get pushed out very quickly.
At midscreen, you can use a 214C ender and then input > 669 > j.C in order to safejump and catch rolls. The key is timing the j.C when Hibiki is low to the ground and can catch both roll directions. This requires some practice in training mode to get used to the timing.
In general, Izuna drop leads to decent oki. In the corner, you can use this oki specifically. 5C catches all techs aside from emergency tech, and you can hitstop OS 6C so that it'll only come out if 5C lands. From this situation, you can input a high damage confirm such as 5C > 6C > j.6D > jc.3D > 6B > 5D > 6D > 4B > 3C > 214C > 5B > 5C > 2C > 236A~C.
Tips and Tricks
Click [★] for character's full frame data