Cayleigh, the ill-fated Duchess of Elath, is a character, who only mentioined in the game.
She was Fabian`s second wife, Erwin`s daughter and Adair`s mother. She died, bearing Adair.
Cayleigh died in 17 years old, bearing Adair.
She became the Duchess of Elath very young, due to her mother`s death.