Isabella of Castile, Queen of Spain.
Isabella was born into the royal house of Castile & Leon. Her father died when she was young and was put under the care of her older half-brother Henry IV. Her upbringing was quite rough for a royal princess. At 16 she chose for herself (a very rare occurrence) Ferdinand of Aragon as her future husband. Before her half-brother's death he recognized her as his heir. With a minor blimp, Isabella was made Queen of Castile & Leon and married Ferdinand in 1469. Ferdinand and Isabella had 5 children together, including the future 1st wife of Henry VIII, Catherine. Isabella is credited for expelling the Jews and Moors from Spain and received praise from the Pope for her work in preserving the Catholic faith. She and her husband also funded Christopher Columbus on his quest. She is also known for leading troops into battle and having her own armor to do it with.
In terms of Isabella's looks she was said to be rather short and stout but strong. She was pale and had blue eyes. She also had either reddish-blonde or auburn hair. It's not known exactly the shade what is known is that it was a shade of red. According to her armor is was also at the very least an inch taller then Ferdinand.
Isabella is also 21st great-aunt once removed on my father's mother's side.