She was given a proper ladies education, learning how to play the instruments and sing as well.
Sybelle and her siblings were taken as wards of Storm's End after her father's defeat in the Ascent of the Lion.
She is known to be a sensuous beauty among the court of Storm's End. Earning the attention of the womanizing Ser Argrave Morrigen. She sang for the younger wards in Storm's End.
Sybelle tried to find help for her House.
Sybelle finally found help in Alysanne Rogers, who promised to help free her House from imprisonment. Alysanne would have Sybelle marry the heir of Storm's End Alyn Connington. The union would ensure loyalty from the Stag supporters, who harboured ill resentment towards the Conningtons and saw the Swanns as leaders of the opposition.
Byron Swann, father-deceased
unnamed little brother, heir
unnamed little sisters