melusine_(fate)
Lancer-class Servant introduced in the British Lostbelt of Fate/Grand Order. She is designed by CHOCO (Chocolate Shop) and voiced by Kouno Marika.
She is not a genderswap of Lancelot, but actually the white dragon of Britain Albion (fate), reborn as a fairy who goes by the name Melusine, who was given the name Lancelot by Morgan.