This ancient and noble house has existed for almost 20 years but of late, they've become aggressive and warlike towards the other houses, their egos boosted by their superior stores of knowledge and spoilers. After years of solitude, quietly reading books, they have emerged to exert dominance over non-readers. When not complaining about how "Yara" is actually named "Asha" or how Tyrion's scar is all wrong, they keep subtly trying to spoil events that won't happen for another 4 seasons right now they're giggling about some wedding that involves the color red, but assure their enemies that "oh, don't worry, that's technically not a spoiler."
Historical Note: Younger members of this house were involved in the Potter siege of the Rowling highlands, which lasted nearly a decade.
Family always comes first, unless you need to murder one of your siblings with a shadow baby.