Judge Brandis Fairweather is a character that appears in Might and Magic VII: For Blood and Honor and Heroes of Might and Magic III: Armageddon's Blade.
Might and Magic VII[]
Both Queen Catherine of Erathia and King Eldrich Parson of AvLee lay claim to the Contested Lands. To prevent a war, an arbiter was appointed to settle the matter. When Arbiter Grey died of a heart attack, they asked the Lords of Harmondale to find a new one.
Gavin Magnus advised them to pick Judge Fairweather, a representative of the wizards of Bracada and a charismatic man who made fair and just resolutions. Archibald Ironfist, on the other hand, wanted them to pick Judge Sleen, a representative of the necromancers of Deyja and known for his habit of not getting involved in disputes he was asked to arbitrate.
If the party picks Fairweather, Erathia and AvLee find a peaceful resolution. If the party picks Sleen, war breaks out, and the necromancers of Deyja raise the corpses to create an undead army. This choice decides whether the party follows the good path or the evil path through the rest of the game. Canonically, Fairweather was the arbiter.
Armageddon's Blade[]
When Gelu was cutting off the kreegans' escape routes before the attack on Kreelah, he heard a lot of talk about a kreegan force known as the Sons of Erebus. Knowing Fairweather to be "the wisest sage in all Antagarich", he sent a runner with a long list of questions for him.
Fairweather replied that the Sons of Erebus were "a near monastic order of demoniacs and heretics", who only desired to carry out King Lucifer's wishes. All of them were well-trained veterans, and their leader Xeron was the most evil and devious among them, hand picked by Lucifer himself. "Trust them not even if they should choose to surrender. Good fortune on your quest."