Lady Syrenei, the last daughter of an ancient line of Valyrian nobility, died giving birth to Shiera, whom she named the "Star of the Sea". Shiera was born with heterochromia, giving her one dark blue and one bright green eye. The singers said that this only accentuated her appearance.
Shiera, who was legitimized by her father on his deathbed, was considered the greatest beauty of her generation. It was also rumored that she practiced sorcery in order to preserve her stunning looks. She never wed, though she had many offers for her hand. She was romantically linked to her half-brother, Bloodraven, who proposed marriage to her on numerous occasions. Another half-brother, Bittersteel, also desired her, leading to further tensions between the two men.