Yo, [@AtomicNut][@Grey][@Pirouette][@Savato], I've got an idea for Itsuki's Kajuka form when he becomes a full one. Basically, the dragon head will grow until it takes up the entirety of his shoulder area, making it much more monstrous. His arms will also grow, becoming more armored, but not that much stronger as the RC cell enter a state where they continuously break down and reform, creating a sort of mist/smoke around him where ever there is Kajuka armor. This smoke is highly caustic towards any Organic material, including Kagune and, to a lesser extent, Quinques, enabling him to aptly break through him when combined with his Rinkaku attack power. However, he's not unaffected by this smoke, which also builds up within the dragon head, which he can open to breath it out in a stream, revealing his form, which is stuck in a sort of decayed state due to the constant degradation and healing going on within, which is very painful, but do to his resistance to the caustic smoke he produces, isn't fatal. 

The idea remains faithful to the original idea for Itsuki, with him being based around Nidhogg somewhat, while also symbolizing what the Kajuka form means to him. The dragon form over-taking his head shows how his ghoul-ish instincts take over and 'consumes' his humanity while in this form, while also representing how he tends to isolate himself from others, in order to, in his mind, protect them from his destructive tendencies, while also over-looking how these actions only seem to contribute to his own self-destruction, killing his humanity slowly but surely with every action he takes, hence why the acid eats away at his features which, along with his characteristic white Kakugan, gives him an appearance more in-line with the stereo-typical ghoul of legend. An undead monster that feasts upon the corpses of men and monster alike.

Any thoughts on the idea?