Kai was off, Fenn was cornered, unable to escape him unless he didn't make it there in time and he was able to escape on a ship. But no, he wouldn't let that happen, not after the pain he'd caused, the people he'd hurt. He took note of his captain jumping to save Vivi, but everything other than that was just a blur of color and sound. He rushed ahead away from everyone else, the sounds of fighting had ceased at some point.
Eventually, he reached his target, slamming into the back of Fenn, he knocked his weapons away and pushed him to the ground, hard. Here he pulled the man's arms behind his back. He could feel the stares of people beginning to fall on him. Fenn's men, The royal family, Their army, one by one eyes turned to the cliff where the grudge match of a decade would finally be ended. His sword was drawn and the blade was pressed into Fenn's back, but even with the moment at hand, he couldn't bring himself to drop the blade, not with so many people watching. In his glory days, he'd have ended this man's life without hesitation. However, these were not the glory days, nor was he the same pirate he'd been a decade ago.
He gritted his teeth and called out to the man he held pinned to the ground, but spoke loud enough for the others to hear. "Captain Fenn, For crimes committed on the high seas, and in the town of Waterdeep. By the authority granted me by his majesty the king, and with a fine amount of personal satisfaction, I hereby place you in the custody of the court... and declare you to be my prisoner." He said, reciting the speech that one was required to give to legally arrest someone in the town of Waterdeep.
Kai glared down at the man he held pinned to the ground, intense hatred welling up inside of him again as he held him there "Such crimes do include, but are not limited to... Piracy" He thought of his lost ship as he said the word "Treason" He thought of the Royal family whom he'd rested Waterdeep from "Murder" He thought of his crew of 300, killed by him and his men "Torture of the most heinous sort... Including the brutal attempted drowning of the young princess Vivi" Kai said as he glanced back at the shore where he saw the princess and the captain being taken back to the castle for medical care.
At this point, Kai hoisted the man up by the scruff of his neck and shoved him down the cliff ahead of himself. Eventually he reached the bottom again and handed Fenn over to the royal army, he didn't know how much longer he could look at this man without killing him. He then walked over to a small tree and sat down, not saying a word to anyone and pulling his hat low so as to cover his eyes.