Sebila of Disart (pronounced SEB-ihl-lah of DIE-sahrt) was a Tortallan noblewoman of the 5th century HE, but was likely born in the 4th century.
She was Lord Raoul's great-aunt. He referred to her as a dragon. She was hard of hearing and wanted Raoul to get married. This only increased his dislike for Lady Sebila, because Raoul liked to determine his life himself, without the interference of his great-aunt.
When she summoned Raoul one Midwinter he took Buriram Tourakom with him so that he wouldn't be met with questions about a possible wife.
Her relation to Balduin of Disart is unknown.