Bikaku is not "all users", the one used here belongs to Nishiki. It is also slightly too high on the body. The Koukaku is flipped around the wrong way, the longer end should be facing away from the player. The Ukaku should have a long ranged attack. Also, the Ukaku is too far down on the player's body: it's supposed to come from in between the shoulders, just below the neck, not from the waist. The "Other Kagune" is just an Ukaku without textures. There should be some difference for all of them, rather than just being the same thing with different models - for example, the ukaku should have a long ranged attack, more like a gun sorta, the koukaku should increase the player's health, the bikaku should increase jump height and the rinkaku should increase the player's damage.
Sorry for the long comment, but I feel like this addon could be really good and these were the things that ruined it for me. Thanks for making this.

Thanks, but i can edit jump height, the models is not from me, i can edit that, but thanks you :)
P.S: Sorry for my bad english, i am french :)

No problem, happy to help