The sister of Percivale, she went on the Grail Quest with her brother. The questers came to a castle where it was the custom to demand the blood of passing women to cure the leprous mistress. Hearing of this, Dindrane voluntarily donated her blood and died in so doing.
In Italian romance, Percivale's sister is called Agrestizia.
Castle of the Leprous Lady | The Legend of King Arthur
Amide | The Legend of King Arthur