Have you read @paper-lilypie 's Copper Cogs Rusted Through??? And if not WHY not??? Please read it! Please I'm begging you its so good!!! The writing, the art they make for it ahhhh its all so good!!
It’s mentioned that Link and his father visited zoras domain previously when he was younger. The gist of this au is that around that time, Yona was also visiting the domain and meeting sidon for the first time, and the two would be told about how they would get married one day. Well I think the two of them absolutely clashed on their first meeting, with Sidon being reckless and a bit slow witted while Yona being a lot more careful and forward thinking. Then they both individually meet a tiny link in their own circumstances and, like kids do, both declared that they wanted to marry link instead. All of the adults were like “ehhhhh age difference makes this hella weird” so they convince the kids to instead make promises bracelets to signify “friendship”. The lil bracelets are styled like normal zora jewelry with a scale from both sidon and Yona, along with a sapphire to signify link. They keep in touch and get along well over the years until the calamity and Yona and Sidon never actually find out what happened to link. After a while, they both forget his face and name, with only the gem on their bracelets to show that they had another part of them. When link wakes up, Zelda was forward thinking enough to leave the bracelet with his belongings in the shrine of resurrection since ya gurl knew how important it was to him (zelda is aroace fight me on this if you dare) when he wakes up he knows the bracelet is important but just can’t remember what for. He wears it anyway. Eventually he arrived at zoras domain on his quest for the divine beasts. Sidon vaugly recognized him, but didn’t mention anything until his father confirmed it. He was originally excited until learning of links amnesia. Obvi he’s disappointed, but he hopes that links journey across hyrule and meeting with the champions would help restore him memories. He leave link with a kiss on the forehead as a promise and a prayer for the three of them to be together again. After link leaves, Sidon obviously sends for Yona who had about the same reaction. Link continues his journey slowly regaining his memories until ganon is finally defeated. There, meeting with zelda again and the darkness over hyrule finally being cleaned, a lot of his memories return to him. Ofc he spends time helping zelda get adjusted but the moment he has some free time, zelda turns around and is like “look, I know for a fact your dying not go see your boyfriend and girlfriend, I survived in that castle alone for a hundred years, I can last like a week.” (Zelda is the goat). And then link giddyly hops on a horse and heads to the domain where he reunited with Yona and sidon. From there they re-establish their relationship and over the 7ish time skip between BOTW and TOTK, they all get engaged. (And then TOTK happens uhoh) AND THATS ALL I GOT RN SORRY FOR THE ESSAY OF G A Y