Himself?
Ryu was still considering the best ways to use his Bone Structure. In reality, its ability could be described in a single phrase, and yet it was exactly that ability that provided him such a broad range of possibilities. In truth, this was probably the case for all Bone Structures and he wasn't exactly special. His far weaker Ice Jade Crystal Body had four abilities, but each one was broader and more variable than the last and could be used in an endless amount of applications.
Take his sped up cultivation as one. It essentially allowed perforations in his skin that enabled him to absorb qi through his skin instead of just through his mouth and nose like everyone else. This increased flexibility was great and made the Ice Jade Crystal Body comparable to much higher forms of Meridians in terms of cultivation speed, especially when paired with his Chaotic Silk Meridians.