Whenever Prince Legend/Twins Legend and Fable gets thrown around, a lot of people think that Legend and Fable would look identical, but I propose this:
Legend who looks like the late queen, and Fable who looks like the late/revived king.
Or maybe half siblings Legend and Fable, where Legend is the illegitimate child between the queen and a knight? I don't know if anyone asked this already, feel free to ignore it lol
Yes!
I personally don't think Legend is the product of an affair, as my introduction to his character outside LU was the manga, which depicts them as happily married, so I just can't imagine them any other way (especially because of the drama and emotional agony that particular storyline puts him through >:D). That, and depending on the lore, that's literally Hyrule's origin story, so going it Legend instead when it's definitely something that was written for Hyrule, just feels like playing favorites. Granted, I DO play favorites, but I don't like stealing back stories to make my blorbo more interesting.
That said, I am a sucker for Legend bing the spitting image of his mother, so much so that sometimes Uncle Aflon get's whiplash from it because he could swear he's talking with his sister-in-law for a moment, but it's actually his nephew. (I played with that factor in I Have Questions For You, but I feel like it's got far more untapped potential!)
What I like the idea of though is that the parent they don't resemble is the one they have a temperament similar too, so Legend is actually more like his father than his mother, and Fable is every inch her mother's daughter even if she doesn't look it, but sometimes you see a peek of the other parent, say, in their laughs, the way they drink their tea, their fondness for a kind of book or food, something that's not necessarily biological, but it's undeniably there.
That said, I like them to look similar, because who doesn't love a good twin swap Princess and the Pauper kinda deal every so often? Like, next to each other, they look very very similar, but if you stand them near a portrait of their parents, it's clear who takes after who and you can't believe you ever thought they were similar at all
The idea of Legend having his mothers' face though is so awesome because that means that as time goes on, it gets harder and harder for him or Uncle Aflon to hide who the mom is, or the fact that it means Legend is indisputably royal. Maybe that's part of why he keeps his hair messy, wears a hat, and tends to scowl all the time; all those things can help mask his features even just a bit, enough that it's less obvious for those who knew his mother to make the connection.
Then again, Legend has no memory of his parents, so there's every chance that he's going about life entirely unawares that everyone who sees him feels like they're witnessing the ghost of the late queen!