Cavendish and Hakuba

Cavendish has an unusual condition, where he possesses a combination of narcolepsy, sleepwalking and Dissociative identity disorder. His inner personality, Hakuba, awakens when Cavendish falls asleep and grants him incredible speed, to the point that he moves too fast for the eyes to track; even with Haki he can barely be seen. Due to this, back in theRommel Kingdom, everyone believed it was the wind that was slashing people. As such, the phenomenon became known as the “Kamaitachi of Rommel“. An even greater example of Hakuba’s speed is that he instantly defeated Dellinger, an executive of the Donquixote Pirates, without even being seen, who himself is renowned for defeating opponents with his speed.

As a fighting style it is not ideal for match-style fights like the competition in Corrida Colosseum. Though he defeated the twenty strongest fighters in Block D instantly, in the end it led to Rebecca’s victory (as she was the only one who managed to see and barely block his attack) as he promptly fell asleep afterwards. It is also not ideal for fighting alongside comrades as Hakuba will attack both enemies and allies alike.

Cavendish has been shown to be able to surpress Hakuba to a degree where he can access his incredible speed without losing control, but only for a very short duration, and he will still fall asleep afterwards.