Okay, with a few minutes on my hands here's my compilation of clues as I see them.
We have Captain Ginger Ears, who admittedly cannot speak. So I omitted him in my search for the SK.
We have Captain Jessop, who makes no mention of whether he can speak or not. However, when one has no lips, certain sounds (called labiodental phonics) become impossible to pronounce... like the sounds for m, v, f, b, p to name a few. Obviously the SK can chat it up. So unless this is a glaring oversight on the parts of the mods, Jessop cannot be the SK.
That leaves you with Captain Seung and Captain Piestewa. Now granted I am not about to make a case for myself as the SK because simply put, I am not the SK. However, if you feel that might not be the case, you are welcome to present me with any evidence that supports your theory.
However, I chose a fairly unique ship (the Kobukson, also known as the turtle ship because of its sometimes plated hull, but most notably, it is covered. There is no deck as such, like you find in traditional pirate ships. Therefore, you do not board from it, which we've seen the SK do.)... I digress. I chose a unique ship on a gamble, knowing it could serve as my defense as a townie, or my downfall as a baddie. I see no evidence pointing to my ship, or even to my flag, which also was very unique in the sense that I used traditional heraldry to pick it out.
However, I do have some evidence that casts a suspicious light upon Nova Piestewa as the SK, and given that the evidence I can find on our other two remaining townies is even less, that makes me pretty certain I'm on the right track.
So from the start:
SK hit 1: The odd accent the SK talks with. It's almost Americanized, the way it's written.
-also, I had thought this clue pointed to Bontempe but it can apply here. Bart tries to face his killer, which I thought was a clue and still think is. However, it would point here to the US Right of Due Process... part of the US constitution.
SK hit 2: Takes place in a bar. Nova is rather fond of drinking, as is pointed out repeatedly in her bio.
-The expression of surprise. Angela Tasman was looking for a man to take advantage of, but found a woman instead.
-Someone mentioned previously, weighing barrels was part of a smuggling deal to ensure they'd sink, to be retrieved later, or at low tide when waters receded. Nova's background is from a family of smugglers.
SK hit 3: In my opinion this was light on clues. All I saw was a reference in Nova's bio to her dislike of being dry and empty-handed, and this hit has no mention of treasure or alcohol, which could point that way.
SK hit 4: This hit specifically mentions "honor among thieves" (again with the smuggling reference?) and also a madman's lure. Nova's bio states that "those who knew her might well later whisper that she was a little bit of a lunatic."
-The SK is laughing, and Nove "always seemed to be having a good time." This is the first of a chain of recurring instances in SK where our killer seems to be in a VERY good mood.
SK hit 5: Again light on the clues? A reference to lady luck, and Nove refers to herself as Lady Nova.
SK hit 6: The biggest clue here; it mentions the SK having learned to swim. Nove was raised in the desert. She, among all the people left, mentions all the things she did to learn to become a pirate, and having lived in the desert she is the ONLY one of us left who we know without a doubt would have HAD to learn to swim.
-We also have the first mate looking up into the night sky for a sign, again referencing Nova's beginning's as a lookout girl for the smuggling ring.
SK hit 7: Again with the confusion for me. All I could think is that he scene was reminiscent of a desert canyon, like the ambush scenes you find in the old west.
SK hit 8: Mentions being brave and bold. Nova started off on a life of adventure.
-Also, the SK is referred to as a hunter. Nova's bio states she was motivated "not by booty but the thrill of the chase."
-Also the SK finds the "necessities" which include alcohol. Again the pervading theme of drink.
I do apologize, Veri, if I'm totally wrong here.

Cause Lemmy is acting awfully sneaky about stuff, and while that may be because he doesn't trust me, I am never going to claim I am 100% right about anything. So my disclaimer stands... if it's not Veri and it IS one of you other sneakies, kudos.

But this is how I see it right now!