"There is no limit to Lannister pride or Lannister ambition."
Ambition, cunning, a lust for power?
If that wouldn't sum up Seara, I don't know what it would be.
Seara is already inspired by some of the ASOIAF women like Cersei but as a House, she fits in perfectly with the Lannisters.
Having a song written about how you slaughter an entire House because you were disrespected by them?
If this was Seara, it would be more like she burned their castle down to the ground, scorching the earth from their existence.
And so he spoke, and so he spoke,
thatΒ lord of Castamere,
But now the rains weep o'erΒ his hall,
with no one there to hear.
If I had to put her into the ASOIAF-lore, I figure she'd be the middle sister to the twins, older than Tyrion. Resentful for never fitting in amongst her siblings (since the twins are too close and Tyrion is the black sheep) and more forceful to find her own piece of power in the world.
As she was mostly left alone by her siblings, she filled her time observing her father and learning as much as she could from the Maester. Forced to be present with Cersei, she receives the same education as her. Yet there is something sharper in Seara, something that is born from the distance that she feels to her own family.
This did mean that she had a close relationship with her Uncle Kevan and Aunt Genna who provided her with some family connection.
As Cersei and Tywin left for King's Landing after being appointed Hand of the King and marrying Robert Baratheon, Seara would have been left at Casterly Rock. Taking this opportunity to find a role in the family that has been left open, as the darling of Casterly Rock.
"While Tywin saw Jamie as his son, Cersei sees herself as a female Tywin and Tyrion is the most like Tywin. It is Seara, the middle one who is Joanna's daughter."
As the events in the books unravel, she is the one left in charge of Casterly Rock throughout the war of the Five Kings, in charge of the support of the Lannister armies and providing the provisions and keeping the city stable.
While the Queens and Kings die early, she knows that the seat of her family is more stable. That it will take only patience to bide her time. That when her sister is stripped of any pride and title, that she will be sent back to a Casterly Rock where she holds support.
That even if Tyrion would return, who would give the title of Warden of the West to the one that killed Tywin Lannister?
That if Jamie would return back to Casterly Rock, would he refuse another sister when he sees that she has been a more succesful ruler than his own twin?
