Airene's family abandoned her on an, once populated, island when she was just seven. She miraculously survived ten more years before explorers -unknowingly- came to her aid.
Blair had never fit in at Auradon because of her power, so she ran away to the Isle where nobody could find her. At 15 she meets a boy that sends her back to Auradon, separating her from him.
"Harry, I miss you."