Ciel Harpo

Introduction
Ciel Harpo  (シエルハーポ  Shieruhāpo ) also known as The Loud King  is a captain in the marines, ruler of the Oto kingdom, and younger brother of the Wonderland pirates first mate: Lee Harpo

Ciel is a master of the Noizu no Shi fighting style. This style, known only by the Oto kingdom, involves using and altering your voice waves to different frequencies and resonating them throughout your body, before unleashing it through a series of physical attacks. While users of this style normally fight bare handed as it is most effective, those of the royal bloodline are taught a special, complete form of this fighting style, which utilises a sword. As Ciel is a master of this technique, he has no trouble using his voice to destroy complete structures such as buildings and even pirate ships.

 Ciel is only a new recruit in the marines, but was granted the rank of captain upon joining due to his knowledge in the Noizu no Shi fighting style, and possibly due to his standing as king of the Oto kingdom. Ciel joined the marines not long after ascending to the throne of the Oto kingdom due to the deaths of the royal family, and after the revocation of Lee Harpos claim to the throne. His reason for joining the marines is to hunt down and capture the person responsible for murdering his family.