Daisy is a central figure in the narrative of Big Order, serving as the enigmatic entity responsible for granting wishes that manifest as supernatural powers. Her background is deeply intertwined with the story's core mechanics, as she is not a typical character but rather an information system or a being that appears to individuals to turn their deepest desires into abilities known as Orders. She first appeared ten years before the main events, and her presence has since reshaped the world by creating a growing number of these gifted individuals.

In terms of personality, Daisy is depicted as a strange and whimsical fairy-like hallucination who operates on her own set of principles, which often appear to be driven by entertainment. She seems to grant powers for the purpose of being amused, expressing disappointment when the resulting chaos does not meet her expectations. Her motivations are not rooted in altruism or malice but in a detached curiosity to witness what interesting actions the new Order users will take with their abilities. This capricious nature gives her an unpredictable and otherworldly charm.

Within the story, Daisy plays a critical role as the catalyst for the plot. She is the one who gave the protagonist, Eiji Hoshimiya, his power, which he used to inadvertently cause the Great Destruction that devastated the world years ago. She continues to influence events by interacting with Eiji, often providing him with crucial information or placing limitations on his abilities to push him into action and observe the results. For instance, she clarifies to him that his true power is not destruction but reality warping, and she installs a range limiter so he can use it without global risk, effectively urging him to stop running from his past and start conquering.

Key relationships are primarily with the main characters. Daisy has a significant connection to Eiji Hoshimiya, as she granted his childhood wish and continues to observe him with interest. She also has a direct link to Gennai Hoshimiya, Eiji's father, who is revealed to be her creator. Gennai developed Daisy as the Desire Accessible Information System, and she communicates with him from an alternate dimension regarding the nature of wishes and the "gate". Her relationship with other Order users is transactional; she appears to grant them powers based on their wishes, like Abraham Louis Fran and his time-stopping ability, to see what conflicts arise.

Regarding development, Daisy remains a relatively static but consistently mysterious force. Her nature as the source of all Orders means her primary function is to facilitate the growth and conflict of others rather than undergo personal change. She serves as a constant, whimsical overseer who nudges events from the background, such as hinting at strategies for fighting powerful opponents. Her development is more about the revelation of her origins as a man-made system rather than an evolution of her personality.

Daisy possesses notable and unique abilities. Her primary power is to grant wishes to individuals, transforming those desires into distinct superhuman abilities known as Orders. She seems to exist in a separate, hallucinatory dimension that only certain individuals can perceive, and she can appear and disappear at will. Beyond granting powers, she can also communicate with creators like Gennai within this space and has the authority to place limitations on existing Orders, as she did by restricting the range of Eiji's otherwise world-spanning ability.