Arianne Martell
Some characters should not be included in the show if they are small or have already died by the time the plot begins. What many fans are baffled by is how Arianne Martell was left out of the show. Unlike many other characters who did make the cut, she actually gets multiple chapters written from her perspective! As a result, instead of her being the heir to Dorne, Trystane Martell receives the distinction.
Shiera Seastar
In the case of Shiera Seastar, the ostensibly most beautiful woman in George R. R. Martin’s world, we can understand why she was left out of the program. The only reason I bring her up is in relation to the Three-Eyed Crow. Shiera, like the Three-Eyed Crow – previously known as Bryden Rivers or Bloodraven – was a great of King Aegon IV Targaryen. She also had a love relationship with her half-brother Bryden. Beyond that, her fate is largely unclear.