Dindrane (or Dandrane, Danbrann, Dandrenor, Dindraine, etc.) is a character in the Old French Grail romance Perlesvaus, an anonymous prose adaptation of (and sequel to) Chrétien de Troyes' great unfinished work Percival, or The Story of the Grail. A sister of King Arthur's knight Percival, who rescues her from an evil kidnapper, Dandrane lives out her days as a maiden in the Grail Castle, together with her mother (Yglais, herself a sister of King Pelles and widow of Alain "the Large", lord of the valley and castle of Kamaalot) and brother (Perlesvaus/Percival).
Contrary to popular notion, Dandrane in the 13th-century Perlesvaus, or The High Book of the Holy Grail is not the sister of Percival who dies helping him (with Galahad and Bors) achieve the Holy Grail. This distinct latter character appears, unnamed, in the Vulgate Queste del Saint Graal (Quest for the Holy Grail) and its successors—and in the same context as Agresizia in the 14th-century Italian novella La Tavola Ritonda (The Round Table).
Though frequently left unnamed, Perceval's sister is a prominent figure in many of the Grail romances, sometimes dubbed the "Grail heroine". The maiden is first encountered upon her brother (sometimes half-brother)'s return to their mother's castle, where she tells him that their mother has died. Percival leaves her in the care of their hermit uncle (or in other sources, at the Castle of Maidens). She later meets up with Percival, Galahad and Bors, telling them who she is (she does not mention her name prior to this). She proceeds to inform them of the Sword of the Strange Belt, the magical Ship of Solomon, the Tree of Life, and other aspects of her destiny.