Tante March, called Aunt March in English, is the paternal great-aunt of the March sisters. She possesses considerable wealth and initially displays a stern, formidable presence to her nieces. Her affluence makes her a potential source of financial support for the March family during their hardships while Mr. March serves in the Civil War.

She maintains a large household staffed by servants, reflecting her high social position. Her reception of the March family is cold and unwelcoming when they seek shelter after losing their home. A significant subplot involves her search for a suitable foster daughter, demonstrating her authority in family matters and capacity for selective benevolence, revealing meticulous standards in personal relationships.

Her nephew, David, frequently seeks loans, capitalizing on her wealth for personal gain. His manipulative behavior includes antagonizing the March family, particularly Jo, driven by fears that her presence threatens his status as Aunt March's sole heir, highlighting tensions around inheritance and favor.

While initially perceived as austere and unyielding, her interactions with Beth, whose gentle nature facilitates a meaningful connection, reveal a capacity for warmth. This leads to a gradual softening in her disposition towards the family, marking notable character progression.

An adaptation-specific detail includes her ownership of a pet parrot, unlike the original novel, enriching her household environment within the anime without altering her fundamental role.

Her disapproval of certain family decisions, like Meg's engagement, persists, reflecting traditional values and concerns over financial security. However, her underlying care for the family's well-being becomes increasingly evident through her actions over time.