Cool. I'll do that then. I wasn't planning on making it like that Merfolk Warlord of the Seven Seas who could grab and shape water itself. More a melee type.
Name: Cyrano Zakath
Age: 29
Appearance: Human-ish but with blue skin, an obvious upturned nose, and rows of sharp teeth.
Position: Combatant. During ship travel, he also keeps an eye out on the devil fruit users to save them if they fall overboard.
Weapons: Large SeaPrism stone sword. Simple, practical, but powerful and sharp. Serated on one edge, which has combat purpose and practical utility (use like a saw to cut trees finely to repair ship). Heavy for just about anyone who doesn't possess immensely brute strength like he does. Negates the bodily defenses of devil fruit users and robs them of their power if he maintain its contact on them. The sword has a fairly simple but strong band attached to the hilt to help prevent dropping it or getting disarmed.
Devil Fruit: No actual Devil Fruit Power. Fishmen trait gives him Shark Zoan-like ability that can't be turned off ever, whether intentionally or sea or seastone. Ability to swim and fight with incredible ease both on land and underwater. Can leap high high from the ocean water upon the crew's ship while carrying heavy loads (Such as the bodies of fellow crew-members who fall off during a heavy storm). Can breathe underwater practically indefinately. Good sense of smell, especially for blood, as per the shark trait.
Technique:
Shark Charge: Simple but effective. A straight line dash with immense speed but somewhat limited ability to turn more than 45 degrees and only about once or twice either way although he can jump forward without losing momentum. His sword can be held so that his blade slices through just about anything it would impact and continue slicing through. When this move is used in the water, Cyrano barely have to use his legs, so he has near perfect mobility and freedom in his approach (although he still have trouble suddenly going backward), as well as the option to ascend or dive. His speed is improved and his power not reduced when fighting in the water. The technique is scarier if the blade is held so as to pierce when approaching such speed.
Cyrano Cylone: A combination of offense and defence. Cyrano jump spins with his sword and practically bounces back and forth between hits as he blungeons and slices repeatably in the air for somewhat weaker but repeated damage, except for if Cyrano extends the final overhead swing for high damage. The spinning movement thus protects him from attacks that come from above, front, below or behind (weak to side attacks) Typically most useful when facing something very large size or when dealing with multiple foes and when in a clustered location where there are lots of things to bounce off of. When used in or above the water, his spin doesn't require any bouncing, but is utterly controlled like a mobile buzzsaw which can be either vertical or horzonital. In addition, water starts spinning in a fairly strong current which hampers with those who attempt to swim or fight underwater. While somewhat weaker than his other attacks, the numberous hits, the stunning of the heavy sword, and the almost unpredictable and fast paced movement makes this a lifesaver in the appropriate situation. Rough example here starting at 0:32 seconds.
Backstory: Cyrano is a soul of practical realistic endeavor. In the sea where pirates fight for power, wealth and fame... in the lands where the Navy fight for power, law and order at all cost... in a world where politics run rampants, beasts and freaks of nature enforce dominion over civilians... it was fool hardy to think the world gives its gifts equally. Power rewards those who possess power. Those with power shape their destiny and the destiny of others. Those with the gift of physical strength save themselves from battle. Those with the gift of charm and tongue save themselves from malipulation. Those with the gift of wealth hold influence and sway. None is without use and none is supreme above all.
Power is power regardless of its forms.
The strong believe in their strength, and because they are strong, they believe that everything that had brought them to that point without delay is right. To the unshamingly hard-hearted, cruelty and savagery went hand in hand with superiority and power. To those who think themselves virtuous, friendship and courage was where a person gained true strength.
Cyrano has seen them both. He rejects neither one, for strength is not exclusive to any moral viewpoint. For as long as one believes that their strength will not fail them, his willpower and viewpoint will be tempered with it.
Conviction is a side-effect of reward and power.
Cyrano is a man of simple hedonism. He enjoys rich food, luxurious beds, lavish entertainment. When he has money, he enjoys himself greatly. When his supply runs low, he works again until he has more to spare. A simple life, void of any great destiny or idealism. But for now, he's not left wanting. To the kind, he may be generous in turn. To the haughty, he breaks their bones.
Cyrano the practical. Cyrano the pleasure-seeker. Cyrano the powerful.
Cyrano is a mercenary and a bodyguard. In the employ of simple unknown communities away from the marines, he guards against wild beasts and pirate attacks. In the employ of simple pirates themselves, he accompany them and protect those who fall overboard, including devil fruit users. For the even more ruthless of those pirates, he would swim toward opposing pirate ships, and threathen to burst holes in their hulls unless they surrender. Those employers who would attempt to cheat them of his reward would be wise to know that at a moment notice, he could sink the very ship he's riding on when nowhere in sight of civilization, leave the crew to drown, the power users unable to survive admist the power of the sea, while he picks the ship of its treasures and swims his way to wherever he may wish. A simple but very effective system. Now, he is with a new crew with a goal for greater things. A chance for new pleasures, more rewards in a land far from the simple life.
The fishman, Cyrano, holds power in his own hands.