Since many people have asked for help on legendary endings I decided to do a mini tip guide for them. It's not *too* explicitly spelled out because I don't want to take away any joy of discovery.
First off how legendary endings work: for each initial conflict there is a running total of points. How many points you get lead to a sliding scale of outcomes usually something like this:
legendary > good > peace > neutral > sorta bad > really, really bad
You earn points all through the seventh week based on a number of factors - your responses, your skills, your relationships, your approval etc.
Not complicated enough? But wait, there's more!
In addition legendary ends *also* require certain things to happen. This can be the successful arrangement of specific thing in the treaties, helping choices other characters make to get official approval or getting people on your side.
But still, wait! There's even more! (There's a reason that legendary outcomes are the ultra challenge of the game)
Sometimes it also requires you have to have nurtured character growth / a character arc over the course of the game. If you haven't succeeded in this, you can't succeed in a legendary ending.
So to unlock them you need to have enough points and then meet all the specific requirements. I'll give you some hints at them below:
Hise/Corval
-Help them find a way they can profit together
-Wedding bells?
Skalt/Wellin
-It would be helpful to have both future leaders convinced peace is the right way, don't you think?
-A confident Pen, is a magical Pen! She might be able to accomplish something special
-Hey, I bet if they figure out they can get something out of a peaceful exchange that might be better, right?
Arland/Jiyel
-Hey you know what might be a big help (even if it's not a hard requirement?) You could use some ally's for peace. Maybe a reluctant friend or an introverted duke?
-There's more than one way to convince them that peace is good, but you better be pretty good at at least one of them
-You might need to get them to agree on a couple points of the treaty. Maybe they can learn from each other more than they think?
Revaire
-You know what would be great? If you could be a miracle worker! So many people to convince that peace is great, stepping down is good, and maybe being a total shit person isn't the best way to be part of a legend. Oh, and it's even better if you can make sure that other countries are invested in peace too.