|Marianne of Tristain|
|Title||Queen of Tristain|
|Occupation||Queen of Tristain|
|Father||Philip III of Tristain|
|Husband||Henry de Tristain|
|Child(ren)||Henrietta de Tristain|
Queen Marianne (Tristanian: Marianne) was a Queen de Tristain. She was the queen consort of Henry and the mother of Henrietta. After her husband's death, she reigned as queen regnant before her daughter became queen.
She was the only daughter of Philip III de Tristain. However, she did not rule as during the reign of Henry, a prince de Albion and . She appears to have considered herself only as the king's wife and the princess's mother.
She knew Karin Désirée de Maillart when she was a princess. When she was thirteen, Karin—then aged fourteen or fifteen—was assigned to be her guard.