TV-Series
Description
Marie en Carlsberg is a young orphaned girl introduced in the anime series Nadia: The Secret of Blue Water. She first appears on a volcanic island later known as Marie's Island, where the protagonists Nadia and Jean discover her unconscious among the bodies of her mother, father, and family dog, all of whom were killed by the Neo-Atlanteans. After reviving her, Nadia and Jean decide to take her under their protection, and she accompanies them as they travel aboard the submarine Nautilus.

At four years old, Marie is notably intelligent and charismatic for her age. She displays a quick understanding of her surroundings and a cheerful, resilient demeanor that often lightens the mood among the older characters. She is curious and eager to learn, traits that endear her to the crew, particularly Jean, with whom she shares a fondness for science and invention. Despite the trauma of losing her family, Marie rarely dwells on her grief, instead focusing on the kindness of her new guardians. Her motivations are simple: she seeks safety, affection, and a sense of belonging, which she finds with Nadia, Jean, and the Nautilus crew.

Marie's primary role in the story is to serve as a symbol of innocence and hope amid the larger conflict between the Nautilus and the Neo-Atlantean forces. Her presence humanizes the adventure, reminding the other characters of what they are fighting to protect. She does not participate in combat but contributes through her endearing interactions and occasional moments of surprising insight. In the series epilogue, an adult Marie narrates the conclusion, revealing that she eventually grew up and retained strong bonds with Nadia and Jean, who came to treat her like a daughter.

Key relationships include her bond with Nadia, who becomes a maternal figure, and with Jean, who acts as a protective older brother. She also forms a close friendship with King, a lion cub that Nadia rescued, and the two are often seen playing together. Marie's development is subtle but meaningful: she transitions from a traumatized, dependent child to a more confident and resilient member of the group, learning to trust and be loved again. She does not possess any supernatural or extraordinary abilities; her notable trait is her emotional intelligence and ability to adapt to extraordinary circumstances with remarkable poise for someone her age.