Initially I was opposed to this idea, but I can kind of understand how Darmani and Mikau may represent elements of Link's OoT personality. Darunia is a war hero who was murdered and his actions forgotten with time, much like Link's valiant efforts to save the Hyrule were forgotten after the defeat of Ganon (with "time," perhaps, in that he went back to before the events ever occurred). Additionally, I can see several parallels between Mikau's relationship with Lulu and Link's relationship with Link. Both fell in love with a form of "royalty" (Zelda being literally and Lulu being the daughter of a singing legend). Both were torn from their loves. And both were forced to collect precious items to reattain their affections (medallions for Link and eggs for Mikau).
Definitely not a water-tight theory, but I can sort of see it.
I still think Kafei may be a better fit for a Link parallel, though. That, or no parallel at all.