Those characters are all from a tournament I'm currently participating in: Tumblr Rumblr II. There was a long hiatus so we did the logical thing and obsessed over AUs.

The Triad is a trio of pirates. Captain Roamer (center) with his First Mate Tybalt (left) and his navigator Coffee (right). As visible, they are in a committed relationship. Which doesn't exactly stop them from committing most of their robberies by seducing their victims or at least getting them to strip down and stealing everything and the clothes.

Originally Roamer was the first mate of his ship, but then he stumbled upon Coffee, nicknamed The Sea Witch for her extraordinary luck. He protected her from the rest of the crew, and in return she helped him overthrow the old captain. That was the basis for them growing on each other, until they became a couple.
Tybalt... kind of happened.
Coffee stumbled upon him in jail when he used his charm and fighting prowess to break himself and her out of it. Both she and Roamer decided quickly that he would be a valuable addition to the crew - and their relationship.

The grumpy white-haired dude on the bottom is Roamers adoptive brother Walker. They both got kicked out of their family due to some beef they had with each other, and their nemesisship continues on to this day. Walker is a bounty hunter now, constantly trying to assault the Triad, but all that happens is that Roamer keeps catching him and treating him like a pet for a while until Coffee helps him to flee from the ship again.