Out of the three types of devil fruits in One Piece—Logia ... reason is simply because logia users can alter their bodies to follow the nature of their devil fruit powers.

This disadvantage renders most Devil Fruit users incapable of traveling directly through water. This list will look at Oden's nine most trusted retainers, and view how they stack up to one another.

Saturn's transformation into a Ushi Oni in One Piece chapter ... into this full spider state, seemingly having lost his mind. This appears to be the doing of his Devil Fruit Awakening.