I often enjoy watching people discuss couples in One Piece. The often say theri favorite crack pairings that would never happen - but damn it its funny toa tak about or make fun of! Also are talks of the obvious and offical couples.
Sometimes I wonder if its just becasue no one remembers Yasopp x Banchina is why they're never mentioned as a couple or its becasue she convinced her hubby to follow his dreams and sent him off while Usopp was a baby….
Its likely both
I mean it cant' be becasue we never seen them together, after all we never really saw Roger and Rouge together. Its a quirk of Oda's , not to show canon couples much. So far out the only two offical couples we've seen for some time (Rayleigh/Shakky, Neptune/Otohime) only Neptune and Otohime have been shown with 'touchy emotional' scenes. Ray-san and Shakky are usually around others and we don't see romantic monents between them.
Most couples are usually already established before we see them. Some had to be form the older gnerations as they are parents for current characters, while some are not. Interesting though is the one couple that has no known child is the only one of that group that is still together.
Rayleigh & Shakky = no child
Roger & Rouge = Ace
Yasopp & Banchina = Usopp
King Cobra & Queen Titi = Vivi
We really have seen only 2 offical couple that formed during the time of the sereis=
Wapol & "Ms Universe" = met before & married during the timeskip -seen in only 2 cover pages
Mr. 9 & Ms Saturday =became a couple and had a child -1 cover page
And then we have one really strong (by oda's persective, not ours) potental couple of established characters=
Usopp and Kaya.
Before the timeskip, it seemed like Hatchi & Keimi were a possiblitiy. Keimi's reaction -extreme blush- to Shakky's question of is she Hatchi's lover, was a big sign of interest. But not so much a clue after timeskip.
While Vivi & Kohza is one of my crack pairings, so far Oda had given on blatent sign they are romantic between, just strong childhood friendship and respect. I think its possible, but there has been no clues like Kaya & Usopp.
Ever sicne Usopp has left the village, every time we see Kaya, Oda makes a mention - by words or picture- that Kaya's loyal to Usopp. When looking at his bounty poster after Enies Lobby, Kaya says she's going back to do some studing, that she needed to finnish her medical training so she could be a doctor and treat Usopp when he fianlly returns fromhis journey.
There there was the recent one after teh timeskip, she's studing hard and ignoring the handful of guys -some quite cute- that were tryignt o get her attentions, al the while taped on the pile of books, is a cut out of Usopp's picture from the newspapers.
While we've not heard Usopp mention Kaya, waaaay back when they were repaing the Merry -believe it was after Wapols attack- Sanji mentions they should replace the ship. Usopp reacts and asks -more like demanded- if he knew the history, if he knew where the got the ship. Sanji said yeah that it was given to them by that "beautiful blone you always talk about."
That statement says two things - it may be off panel but Usopp talked a lot about Kaya AND that Usopp describes her as beautiful. Sanji never met Kaya so he wouldn't know what she looked like.