Replying...
Intro. Kiera, better known as Kiera of Tyrosh is originally from the Free City of Tyrosh and daughter of the Archon was born in 180 AD, her sister Rohanne is the widow of Daemon I Blackfyre nicknamed the Black Dragon, bastard son of King Aegon IV Targaryen and his cousin, Princess Daena Targaryen, being the eldest of the Great Bastards. He was the founder and head of House Blackfyre. The marriage between Kiera and Valarr was arranged by Daeron II Targaryen and the Archon of Tyrosh. However, Daeron II died before the marriage could take place; this was carried out during the reign of King Daeron II Targaryen, who paid the dowry that the late King Aegon IV Targaryen had promised to the Archon of Tyrosh so that his daughter Kiera could marry Valarr Targaryen. She was fourteen years old when she married Valarr, he did not intend such a marriage, but he finally decided to honor his grandfather Daeron II Targaryen according to his wishes.

Kiera from Tyrosh

@Cecilia Venier Baffo