Appearance: (I couldn't find pics for this guy...if i ever do i will put one here)
Link would be a tall man if he had legs to stand on. To be specific he would stand at 6 feet. He is well built, think hercules if he was real. His hair is a raven black, with curls in it. His skin seems to be of an olive shade, while his tail is pitch black. His hazel eyes seem to hold a softness that other mermen lack a feeling that you can trust him. 
 
Name:
Link

Age: (doesn't have to be specific, just to know if you've been a merperson for a long time or recently turned)
Turned at age 22, that was about 50 years ago. 

Tail:
An all black scaled tail. Each scale has an iridescent sheen too it. He has a fin on the back which allows for a bit more speed. (kind of like this: [url=http://img03.deviantart.net/c53b/i/2012/212/c/3/mermaid_tail_07__black_koi__by_deviantroze-d59cxke.png]click me[/url]

Specific Skill: 
-Deception: For behind that kind smile is razor sharp teeth, hidden teeth that seem to come out of his gums. (like toothless) 

Bio: 
Link does not remember being human. But, it is said he was a victim of a shipwreck and a shark attack. He had almost died. Being unconscious means he did not witness the mermaid whom saved him. The mermaid who gave him life amongst the sea. 
Upon his rebirth, link found himself alone. Alone with only the memory that something terrible happened to him and a name. The name link stuck with him, though why those are the memories that stayed is unknown. 
He found a merman base and for a time, stayed. Finding his deception capabilities to give him great reward among the brutes. However, he was not nearly as violent (despite the teeth saying otherwise..) as these mermen. He did not agree with the idea of harming a mermaid or really harming anything without reason. He was cast out rather quickly. 
He now swims alone, often seen with pods of orcas, sharks, and other beasts. 

Anything else:
Link is very good at deception, however, he is a good person. While strong, he will not randomly beat up a mermaid just because she is a mermaid. If nothing else, he is more likely to help them and deceive the mermen. 
After all, mermaids have more things that could help him in the future.