Fukuoka Soren

Fukuoka Soren (フクオカ・ソレン, Fukuoka Soren) is a shinobi of the Fukuoka Family and Kosaka Isshin's apprentice within the Black Widow Pirates. He is not given a title, but considerable trust is placed upon him by Isshin. Later, Soren is also revealed to be an apprentice of the Black Widow Pirates' Night Parade.

Kosaka Isshin
Isshin is Soren's teacher. They appear to have an amicable bond with one another, with Soren cheerfully obeying his requests. Isshin also trusts Soren considerably, as he gave him the important task of protecting his office.

Abilities and Powers
Little is known about Soren's strength as a Pirate. As Isshin's student, he is likely quite gifted in combat based on his teacher's capabilities. It is also implied that Isshin trusts him considerably, for he tasked him with protecting his office. Soren is shown carrying a sword on his person, and is assumed to be skilled in its use.

Physical Prowess
Soren has proven himself to have substantial physical ability. He is able to effortlessly perform maneuvers similar to, albeit with a gliding motion as opposed to a stepping motion. He is quite flexible, managing to keep himself positioned in a small air vent without having his body bump into the ends and create unnecessary noise.

Stealth Prowess
As a Ninja and member of the Night Parade, his primary skill is to sneak through the shadows and move with the wind in order to avoid visual detection from others, sneaking up on ships with ease. Moreover, he is capable of surviving in low-oxygen environments for extended periods of time without any sort of repercussion to his health, due to his training. Specifically, he keeps himself in supply crates and barrels.

Haki
Soren boasts notable skill in. He is capable of shifting the focus of his Haki from his eyes to his ears, enhancing his hearing ability as opposed to his sight. To this end, he was able to hear conversations all across a small town from a high vantage point and isolate specific conversations with little effort.

Devil Fruit
Soren consumed the Koru Koru no Mi, a  that enables him to transform, create and control coal. He is capable of transforming into a black, ash-like material which allows him to freely access areas normally closed off to him by flying through the small openings.