Marcel acts as the Guardian of Greenery in the Angelique universe, intrinsically tied to the element of plants and nature. He appears as a recurring figure across multiple franchise installments, including the original Angelique game, Angelique Special 2, Angelique Trois, and Angelique Etoile, consistently fulfilling his elemental guardianship role. Within Angelique Trois, Marcel serves as one of three instructors under Timka, specifically tasked with teaching the protagonist about Greenery Sacrea alongside Wind and Earth elements. His instruction focuses on guiding the cultivation of the continent Arcadia by boosting its "Happiness" ratings through plant-based fortifications, utilizing abilities centered on nurturing growth and fostering ecological harmony. His personality consistently emphasizes sweetness, innocence, and a profound connection to living things, characterizing him as gentle and delicate in interactions. This gentle nature defines his role as a "Friend to All Living Things," highlighting his deep affinity for the natural world. In the OVA Angelique: Twin Collection, Marcel features as one of the central characters throughout all eight episodes. The series pairs him with other guardians in each episode.