Damsel of the Cart
In the Fourth Continuation of Perceval, a maiden known as the Damsel of the Cart, because she carried the body of her slain lover around in a cart.
Her lover had been killed by the Knight of the Dragon. Claire wore her clothing inside-out in mourning. Perceval met her, learned her story, and avenged her lover’s death by killing the Knight of the Dragon. Claire then interred her paramour and retired to a hermitage in Claradeure.
Her counterpart in Perlesvaus is the unnamed lover of Alain.
Source
Fourth Continuation of Chrétien’s Perceval | Gerbert de Montreuil, c. 1230