Louisa May Alcott belongs to the Guild, later transitioning to the Renewed Guild following the original organization's dissolution. She possesses short, honey-colored hair ending above her shoulders in soft waves, featuring a center-parted fringe. Her appearance includes rounded black glasses and a dark brown ribbon or headband. Her typical outfit consists of a white ruffled blouse, a cream shawl displaying an intricate tree branch and leaf pattern, a light mahogany skirt secured with black fasteners, black-and-white diamond-patterned tights, and low gray boots. The anime adaptation modifies her shawl pattern and hair accessory.
Profoundly introverted and experiencing significant social anxiety, she frequently becomes flustered or stammers when approached by strangers or confronted with stressful situations like beggars or public arguments. She avoids social interactions beyond necessary communication with her leader, Francis Scott Key Fitzgerald, and historically kept to herself within the Guild. Though intensely timid, she demonstrates formidable strategic intelligence and unwavering loyalty. Her tactical acumen allows her to accurately predict adversaries' actions without personal knowledge of them. Her loyalty to Fitzgerald is absolute; she cares for him after his defeat, refuses to divulge information about him under duress, and views him as essential to her purpose, stating she has "no reason to live" without his directives.
Her ability, **Little Women** (若草物語, *Wakakusa Monogatari*), enables her to subjectively perceive time slowing to 1/8000th of its normal pace while working alone in a private room. This facilitates extended periods of concentrated planning and analysis within compressed real-world timeframes—allowing her to conceptualize strategies equivalent to weeks of work in mere minutes. The ability requires isolation, as external interruptions nullify its effects. It does not affect surrounding objects or machinery, leading her to rely on manual tools like quills and paper instead of computers, which cannot operate at her perceived speed. She stocks provisions beforehand to avoid interruptions for sustenance. This power, combined with her enhanced intelligence, enables her to generate exhaustive contingency plans, cementing her role as the Guild's primary tactician.
Limited background details indicate she has parents living elsewhere and recruited Lucy Maud Montgomery into the Guild from an orphanage, later defending her during a mission failure. Her low self-esteem is noted, though its origins remain unspecified. After the Guild's collapse following Fitzgerald's defeat, she locates him in a foreign country, aids his recovery, and supports his financial rebuilding efforts. Together, they expose corporate corruption to gain control of a security company, reestablishing their operational base as the Renewed Guild. This iteration allies with former enemies like the Armed Detective Agency during crises, operating under Fitzgerald's leadership with Alcott maintaining her strategic role.
Notable trivia includes her fear of heights and her occasional consumption of coffee before undertaking work tasks.